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    Google Cloud の障害履歴

    9 Google Cloud incidents · 2025年7月 — official updates, affected components, duration and resolution details.

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    複数のサービスは、ヨーロッパ西部2地域で問題が発生していました.

    開始 2026年10月20日 6:00 UTC · 6h 8m

    Outage重大なインシデント
    1. 2026年10月20日 8:35 UTCresolved

      **概要** 複数のサービスは、ヨーロッパ西部2地域で問題が発生しています。 **記述** 2026-10-19 23:08 PDTの月曜日から始まるEURPE-west2での複数のサービスの問題が発生しています。 当社のエンジニアリングチームは、問題を調査し続けています。 弊社では、火曜日、2026-10-20 02:30 PDT のアップデートを最新の内容でご提供いたします。 被災された皆様、お詫び申し上げます。 **症状** 複数のGoogleクラウドサービスは、欧州の2地域におけるエラーと断続的なネットワーク障害を経験しています。 **ワークアラウンド** 只今

    2. 2026年10月20日 9:24 UTCresolved

      **概要** 複数のサービスは、ヨーロッパ西部2地域で問題が発生しています。 **記述** 2026-10-19 23:08 PDTの月曜日から始まるEURPE-west2での複数のサービスの問題が発生しています。 当社のエンジニアリングチームは、問題を調査し続けています。 2026-10-20 04:00 PDT のアップデートは、現在の詳細にて行います。 被災された皆様、お詫び申し上げます。 **症状** 複数のGoogleクラウドサービスは、エラーが高まっています。 europe-west2地域における断続的なネットワーク障害。 注意:Looker Studioは、この停電の影響を受けません。 **ワークアラウンド** 可能であれば、インパクトのある顧客は、別の利用可能な場所(ゾーンまたは地域)に影響されたワークロードを移行しようとするかもしれません.

    3. 2026年10月20日 11:00 UTCresolved

      **概要** 複数のサービスは、ヨーロッパ西部2地域で問題が発生しています。 **記述** 2026-10-19 23:08 PDTの月曜日から始まるEURPE-west2での複数のサービスの問題が発生しています。 当社のエンジニアリングチームは、問題を調査し続けています。 弊社では、火曜日、2026-10-20 05:00 PDT のアップデートを最新の内容でお届けいたします。 被災された皆様、お詫び申し上げます。 **症状** 複数のGoogleクラウドサービスは、エラーが高まっています。 europe-west2地域における断続的なネットワーク障害。 注意:Looker Studioは、この停電の影響を受けません。 **ワークアラウンド** 可能であれば、インパクトのある顧客は、別の利用可能な場所(ゾーンまたは地域)に影響されたワークロードを移行しようとするかもしれません.

    4. 2026年10月20日 11:12 UTCresolved

      **概要** 複数のサービスは、ヨーロッパ西部2地域で問題が発生しています。 **記述** 2026-10-19 23:08 PDTの月曜日から始まるEURPE-west2での複数のサービスの問題が発生しています。 パワーイベントのせいで、ヨーロッパ西2-b圏内の停電に遭遇しました。 パワーイベントが緩和されます。 インフラサービスの部分的な緩和は、次の30分以内に観察され、残りのサービスはその後緩和されます。 弊社では、火曜日、2026-10-20 05:00 PDT のアップデートを最新の内容でお届けいたします。 被災された皆様、お詫び申し上げます。 **症状** Google Cloud サービスは、ヨーロッパ西2-b ゾーンで利用できません。EURPE-west2 地域の一部サービスは、高いエラーと断続的なネットワークの問題が発生する可能性があります。 **ワークアラウンド** 可能であれば、インパクトのある顧客は、別の利用可能な場所(ゾーンまたは地域)に影響されたワークロードを移行しようとするかもしれません.

    5. 2026年10月20日 11:58 UTCresolved

      **概要** 複数のサービスは、ヨーロッパ西部2地域で問題が発生しています。 **記述** 2026-10-19 23:08 PDTの月曜日から始まるEURPE-west2での複数のサービスの問題が発生しています。 europe-west2-b ゾーン内の停電が発生しました。 パワーイベントが緩和されます。 私たちはサービスの回復を見て、既存のワークロードの回復を優先しています。 新規のワークロードをまだ作成できません。 既存のワークロードの完全な回復は、火曜日、2026-10-20 06:00までに暫定的に完了する必要があります。 火曜日、2026-10-20 06:00 PDT による更新を現在の詳細に提供します。 被災された皆様、お詫び申し上げます。 **症状** Google Cloud サービスは、ヨーロッパ西2-b ゾーンで利用できません。EURPE-west2 地域の一部サービスは、高いエラーと断続的なネットワークの問題が発生する可能性があります。 **ワークアラウンド** 可能であれば、インパクトのある顧客は、別の利用可能な場所(ゾーンまたは地域)に影響されたワークロードを移行しようとするかもしれません.

    6. 2026年10月20日 12:44 UTCresolved

      **概要** 複数のサービスは、ヨーロッパ西部2地域で問題が発生しています。 **記述** 火曜日、2026-10-20 05:10 PDT のヨーロッパの最もワークロードのためのサービスの回復を見ています。 弊社では、火曜日、2026-10-20 07:00 PDT のアップデートを随時更新いたします。 被災された皆様、お詫び申し上げます。 **症状** Google Cloud サービスは、ヨーロッパ西2-b ゾーンで利用できません。EURPE-west2 地域の一部サービスは、高いエラーと断続的なネットワークの問題が発生する可能性があります。 **ワークアラウンド** 可能であれば、インパクトのある顧客は、別の利用可能な場所(ゾーンまたは地域)に影響されたワークロードを移行しようとするかもしれません.

    7. 2026年10月20日 14:03 UTCresolved

      **概要** 複数のサービスは、ヨーロッパ西部2地域で問題が発生していました。 **記述** GCP製品に影響を受けた問題は、ほとんどの顧客にとって緩和されてきました。現在、非常に少数の顧客と当社のエンジニアリングチームに影響を及ぼしていると考えられています。 ご質問や影響が生じた場合は、サポートチームにてお申し付けください。この問題が解決されるまでお任せください。 詳しくはこちらをご覧ください。 社内調査が完了したら、この事件の分析を公開します。 問題の解決に取り組んでいる間、あなたの忍耐に感謝します。 **症状** Google Cloud サービスは europe-west2-b ゾーンで利用できませんでした。 欧州地域における一部のサービスは、エラーや断続的なネットワークの問題が発生する可能性があります。 **ワークアラウンド** 問題が緩和されたとはいえません.

    8. 2026年10月22日 8:42 UTCresolved

      **予備事件報告** 当社は、Google Cloudサービスがお客様の組織に重大な影響を及ぼすと認識し、本件事故がお客様の事業に及ぼす可能性があることをお詫び申し上げます。 根本原因に対処し、これから起こることを防ぎます。 なお、この情報は投稿時に最高の知識に基づいており、調査が継続して変更される場合があります。 調査が完了すると、予防措置による最終事件報告が掲載されます。 以下に記載されたもの以外に影響を受けた場合、https://cloud.google.com/support を使用して Google Cloud サポートにご連絡ください。 **発行日/時刻(米国/太平洋時間)** 開始:10月19日 2026 23:00 事件終了:20 10月2026 05:10 所要時間:6時間10分 **概要** 2026年10月19日(月)、ヨーロッパ西2地域における複数のGoogleクラウドプラットフォームサービスは、サービスの中断、エラー率の上昇、アプリケーションプログラミングインターフェイス(API)のタイムアウト、6時間と10分の遅延の処理を経験しました。 中断は、データセンター施設で電力の中断によってトリガーされ、一時的に物理的なホストサーバー、ネットワークルーティングハードウェア、およびストレージシステムをオフラインで取った可用性ゾーンEURPE-west2-bをホスティングしました。 これにより、二次的障害が発生し、不当な地域のインフラを横断する遅延をキューイングしました。 **予備ルート原因** データセンター施設で電力網の破壊が発生したときに発生した事故は、可用性ゾーンEURPE-west2-bをホスティングしていた。 破壊時の連続電力を維持するために、施設のバックアップ電源システムへの自動転送がすぐにトリガーされました。 設備の負荷はオンサイトの緊急のディーゼル発電機の開始順序の間に無停電電源装置(UPS)電池銀行に移されました。 プログラマブル・ロジック・コントローラー(PLC)の自動化システム(第一次およびバックアップPLC)は、バックアップ・ジェネレーターが負荷を想定しないように、発電機の論理自動始動/搬送操作を開始できなかった。 UPS 電池の予備が、物理的なホスト サーバー、ネットワークの切換えの生地および europe-west2-b の失われた力に捧げられたローカル貯蔵の配列がオフラインで行なわれたとき。 顧客のインパクトにつながるイベントのシーケンスは以下の通りです。 - 22:53 アメリカ/太平洋では、データセンター施設で電力の崩壊が発生し、可用性ゾーンのヨーロッパ-西2-b、PLC(プログラム可能な論理コントローラ)の起動障害が発生し、電気負荷を想定した施設の緊急発生器を防止しました。 バッテリーが枯渇するまで、UPSのバッテリーバンクによって、施設の負荷は米国/太平洋23:00から始まります。 - 物理ホストサーバー、ローカルストレージインフラ、およびネットワーク集計ハードウェアが、EURPE-west2-b の失われた電力の場合、インスタンス、データベースのレプリカ、およびそのゾーンのワーカーノードが即座に到達不能になるようにしました。 - 地域のトラフィックルーティング機構とクライアントアプリケーションは、地域内の隣接する可用性ゾーンで利用可能なインフラに向けた自動フェイルオーバーを開始しました。 - オフラインゾーンのメタデータとカタログコンポーネントに向けた地域サービス制御平面からのクロスゾーンリモート手順呼び出しは、初期のジョブ投稿が停止し、APIレイテンシーのスパイクを引き起こします。 - リダイレクトされたクエリ実行、高可用性データベースのフェイルオーバー、およびコンピュートワークロードの突然のインフルエンザは、利用可能なコンピュートスロットと処理能力を他の可用性ゾーンで飽和させ、高額な入学キューを作成、遅延されたデータベースのフェイルオーバー完了、および領域全体で500と503 APIエラーを断続的に作成します。 Google のエンジニアは完全な根本的な原因の分析(RCA)を始め、利用できると付加的な情報を提供します。 **是正** Googleのエンジニアは、自動化された監視システムとプローブを経由して混乱に警告しました 23:08 月曜日に米国/太平洋, 19 10 月 2026, 上昇した API のエラー比率を検出しました, ジョブの送信タイムアウト, ユーロ/西2-b のインフラの到達可能性の損失. エンジニアリングチームは、影響を受けたインフラストラクチャを隔離し、回復を開始するために直ちに動員しました。 - トラフィックの分離: Google のエンジニアは、オフラインの可用性ゾーン(ヨーロッパ西2-b)を分離し、影響を受けるインフラから離れた地域サービスルーティングを調整し、クロスゾーンのクライアントのリクエストをオフラインのエンドポイントからタイミングで防止します。 - Workload Reprioritizationとリソース・セーフガード: エンジニアは、スケジュールの割り当てと容量の制限を調整し、不当なインフラ全体で有効な顧客の予約を優先し、実行スロットのリソースの内容を削減し、地域のワークロードのキュー・バックログを緩和します。 - 電力網の回復:オンサイト施設のエンジニアは1時間以内に、供給が戻ったら安定した電力供給の優雅な回復を行ないました。 これにより、設備の電力を回復させるために、リセットと緊急バックアップジェネレータの自動化コントローラーをテストしました。 - プログレッシブ・インフラの再活性化: Google のエンジニアは、根本的な Google のクラウドインフラとサービスを体系的に再起動しました。 - 制御された交通再入場:システム健康とストレージの整合性が検証されたら、エンジニアは段階的に実行され、管理されたトラフィック再入場をゾーンのヨーロッパ西2-bに戻し、蓄積されたジョブのバックログがスムーズにクリアできるようにしました。 2026年10月20日(火)に米国/太平洋に拠点を置くことで、顧客ワークロードの大半にサービスの利用状況が回復し、地域のGoogle Cloud Platformサービスに関するほとんどの顧客の解決が確認されました。 残りの隔離されたワークロードの小さな尾の回復に続いて、事件の閉鎖通知は、投稿されました 07:03 アメリカ/太平洋. **影響の記述** 2026年10月19日(月)、23日(火)、20日(火)、2026年10月20日(火)、14日(日)、14日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日(日)、22日)、22日(日)、22日(日)、22日)、22日(日(日)、22日(日)、22日(日)、22日(日)、22日(日(日)、22日(日(日(日(日)、22日)、22日)、22日(日(日)、22日)、22日(日(日(日(日)、22日(日(日)、22日) 初期段階では、23:00から0429 US/Pacific(duration 5時間、29分)、顧客は、ほとんどのGoogle Cloud Platformサービスが回復するまで、高度なエラー率、APIタイムアウト、および処理遅延を経験しました。 プラットフォームサービス修復後、コンピュートエンジンインスタンスで稼働している一部の顧客のワークロードは、より長いリカバリテールを経験しました。 によって 04:46 米国/太平洋の新しい仮想マシンの作成は再開し、コンピュートエンジンの仮想マシンの99%以上PM0米国/太平洋は健康な状態でした。 仮想マシンの問題を経験している残りの顧客は、通常の手順に従ってカスタマーサポートの問題を提出する必要があります。 物理的な停電は、欧州のデータセンター施設に厳格に隔離されていましたが、不正確なゾーン(ヨーロッパ西2-aおよび欧州西2-c)または地方のアーキテクチャ全体で作業負荷を実行している一部の顧客は、予期しない影響を経験しました。 第一次原因は 1) 瞬時の需要は、非影響の計算能力と 2) 星の境界を横断する同期制御平面検証の依存性を急増しました。 感染した製品: BigQuery、Looker、Google Compute Engine、Google Kubernetes Engine、地域永続ディスク、およびクラウドSQL。 これらのサービスは、急激な容量の枯渇、およびオフラインゾーンからの検証を待っている制御プレーンAPIタイムアウトによって駆動される予期しない劣化と故障の問題を経験しました。 europe-west2-b 内で完全にホストされているワークロードとリソースは到達できませんでした。 Cloud SQL、AlloyDB、Redis 用の Memorystore、および Cloud Bigtable などの不正な機能を備えたデータストレージサービスが、欧州の 2 b の停電時に、近隣の不当なゾーンに引き渡されました。 europe-west2 地域を網羅する多角的および地域サービスは、高レイテンシー、過渡的な API エラー(HTTP 500 や 503 エラーなど)を経験し、障害のあるトラフィックが不当な地域資源に集中し、オフライン コンポーネントへのクロス・ゾーン・コールに集中するようにキューイングするタスク・インクルード。 地域におけるストレージ書き込み操作は、初期のフェイルオーバー期間中に一時的なエラー率を経験し、容量のリバランスとして急速にサブスライディングする前に、地域のクエリ入学キューを一時的にピークしました。 次のGoogleクラウドプラットフォームサービスは、影響を経験しました。 - PostgreSQL 用の PostgreSQLDB - アピギー - BigQueryデータ転送サービス - クラウドデータ融合 - クラウドファイルストア - クラウドファイヤーストア - クラウド負荷分散 - クラウドメモリストア - クラウドNAT - クラウドラン - クラウドスパーナー - クラウドワークステーション - データストリーム - ダイアログフローCX - Googleアプリエンジン - GoogleのBigQuery - Google クラウド ビッグテーブル - Googleクラウドデータフロー - GoogleクラウドDataproc - GoogleクラウドNetAppボリューム - Googleクラウドパブ/サブ - GoogleクラウドSQL - Googleクラウドストレージ(GCS) - Google Computeエンジン(GCE) - Google Kubernetesエンジン(GKE) - Google SecOps (セキュリティ情報とイベント管理 [SIEM] およびセキュリティオーケストレーション、オートメーション、応答 [SOAR]) - Looker(Googleクラウドコア) - ルッカースタジオ - マネージド・エアフロー(Google Cloud Composer) - Apache Kafka の管理サービス - Memcachedのメモリストア - Redisのメモリストア - Redis Clusterのメモリストア - バルキーのメモリストア - ネットワークコネクティビティセンター - 持続的なディスク - プライベートサービス接続 - スピーチ・ツー・テキスト - 仮想プライベートクラウド(VPC) - VMWareエンジン

    9. 2026年10月27日 15:13 UTCresolved

      ## Incident Report ### **Summary** On Monday, 19 Oct 2026 (Tuesday, 20 Oct BST), a data center facility that hosts europe-west2-b, experienced an external electrical power disruption. This resulted in service unavailability for workloads located in this zone. As traffic was redirected to alternative cloud regions or unaffected zones within europe-west2 cloud region, these workloads experienced transient latency and elevated errors affecting services across europe-west2.  The primary impact was mitigated after 6 hours 8 minutes. ### **Root Cause** **Facility architecture and background:** The data center facility in the UK region hosts Cloud clusters serving the europe-west2-b zone, which form part of the multi-zonal europe-west2 Cloud region. The site relies on a 2N utility power architecture—meaning the facility has complete duplicate power paths for every critical load—backed by a central high-voltage generator bank managed by a dual-redundant Programmable Logic Controller (PLC). Primary utility power is supplied to the facility via two independent feeders (A and B), supplemented by a standby utility connection configured for manual campus-wide transfer during maintenance operations or emergency events. The two high-voltage primary feeders terminate at separate primary intake switchboards capable of closed-loop operation if either board is taken offline. Switching between the primary and standby utility providers utilizes open transitions and key interlocks to prevent parallel connections across sources. Static Uninterruptible Power Supply (UPS) battery systems provide 5 minutes of autonomous runtime. This bridge power ensures uninterrupted operation while the PLC detects utility undervoltage events, initiates diesel generator startup, synchronizes the generators, and transfers the site load. Prior to the utility disruption, the facility had been placed in a temporary single-feed (1N) bridged maintenance posture on the primary utility. Circuit breaker feeder B was physically opened and key-interlocked (Locked Out Tagged Out) to allow for corrective repairs following issues identified during a quarterly generator load test on 14 Oct 2026. Consequently, primary utility feed A was supporting the total critical load while repairs were conducted on the B feeder pathway. **Root Cause:** On Monday, 19 Oct 2026 at 22:53 US/Pacific (Tuesday, 20 Oct 06:53 BST), the primary utility provider experienced an outage on primary utility feed A, caused by an external underground cable fault on the utility network outside the data center facility.   When the primary utility feed A was lost, the facility’s generator plant failed to receive a signal to automatically start and take critical load due to a design voltage-sensing and misconfiguration in the PLCs. The facility's static UPS battery banks carried the critical load as designed until their battery reserves depleted resulting in a complete power loss across data halls. The investigation of the PLC configuration identified the root cause as a misconfiguration of the PLC logic that did not verify both an undervoltage condition and physical breaker position for both utility feeders. Instead, the PLC undervoltage sensing inputs were wired upstream (line side) of the isolated utility feed B breaker. The PLC was programmed to verify whether voltage was present on the feeder before commanding a generator start. As the utility feed B remained energized upstream, both PLCs sensed live upstream voltage on the disconnected path. As a result, the PLC logic indicated that a healthy utility source was available, even though the primary and secondary distribution feeds were de-energized, and did not issue a start command to the generator plant.; The onsite facilities team attempted to execute a remote load transfer via the PLC; however, the system inhibited the action. Recognizing that the UPS battery reserves would be exhausted before further remote operations could be resolved, the team transferred the facility load to the standby utility source, restoring the critical load that was lost once batteries depleted during this process. Once utility power was restored via the standby utility source, and UPS batteries started recharging, the onsite facility teams and OEM vendors reconfigured and validated PLC functionality on both undervoltage and breaker status. After the power loss was initially detected, Google engineers began work to mitigate failover failures and prepare service recovery. Upon restoration of the utility source, UPS and generator capabilities, they began the process to re-enable services in europe-west2-b. ### Remediation and Prevention The sequence of events leading to customer impact was as follows: * **19 Oct 22:53 US/Pacific (20 Oct BST 06:53 BST) -** An electrical power disruption occurred at the data center facility hosting availability zone europe-west2-b, and a PLC (Programmable Logic Controller) startup fault prevented facility emergency generators from assuming the electrical load. Facility load continued to be supported by UPS battery banks until the batteries were depleted. * **19 Oct 23:00 US/Pacific (20 Oct 07:00 BST)** **Impact start -** As battery backups were exhausted, physical host servers, local storage infrastructure, and network aggregation hardware in availability zone europe-west2-b lost power, causing instances, database replicas, and worker nodes in that zone to become immediately unreachable. * **19 Oct 23:04 US/Pacific (20 Oct 07:04 BST) -** Google engineers were alerted to the disruption via automated monitoring systems and probers, which detected elevated API error ratios, job submission timeouts, and loss of infrastructure reachability in zone europe-west2-b. Engineering teams immediately mobilized to isolate the affected infrastructure and commence recovery. * **19 Oct 23:09 US/Pacific (20 Oct 07:09 BST) -** Regional traffic-routing mechanisms and client applications initiated automated failover toward available infrastructure in adjacent availability zones within the region. * Cross-zone remote procedure calls from regional service control planes directed to metadata and catalog components in the offline zone encountered timeouts, causing initial job submission stalls and API latency spikes. * The sudden influx of redirected query executions, high-availability database failovers, and compute workloads saturated available compute slots and processing capacity in other availability zones, creating elevated admission queues, delayed database failover completions, and intermittent 500 and 503 API errors across the region. * **Traffic Isolation:** Google engineers isolated the offline availability zone (europe-west2-b) by adjusting regional service routing away from the affected infrastructure, preventing cross-zone client requests from timing out against offline endpoints. * **Workload Reprioritization and Resource Safeguards:** Engineers adjusted scheduler allocations and capacity limits across unimpacted infrastructure to prioritize active customer reservations, reduce resource contention on execution slots, and relieve queue backlogs for regional workloads. * **19 Oct 23:54 US/Pacific (20 Oct 07:54 BST) Utility Power Restoration** **\-** Power supply from the standby utility source was restored and power restoration to the data hall began. * **20 Oct 00:20 US/Pacific (08:20 BST) Datahall Power Restoration** **\-** Utility power was re-established to the datahalls. Mains utility power normalized; power feed to data hall verified. Following this, the site operations and engineering teams focused on and completed a reset and tested the emergency backup generator automation controllers to restore facility power. * **20 Oct 00:40 US/Pacific (08:40 BST)** **\-** Clusters began to recover, cluster manager systems started rescheduling compute jobs.  * **20 Oct 00:45 US/Pacific (08:45 BST) \-** Network devices were back online.  * **20 Oct 00:50 US/Pacific (08:50 BST) \-** Due to the immediacy of power loss, storage devices with unclean shutdowns began recovery. Responders recognized this and chose not to restore services that would otherwise make this worse. Because of the large volume of storage devices involved, this process required a substantial period to finish prior to restoring service to customers. * **20 Oct 03:13 US/Pacific (11:06 BST)** **\-** Power redundancy was verified and the storage infrastructure was sufficiently restored to prepare the initiation of controlled traffic re-admission. The remaining storage systems continued recovery operations. * **20 Oct 03:45 US/Pacific (11:45 BST) Controlled Traffic Re-admission** **\-** Once system health and storage integrity were verified, engineers executed gradual, controlled traffic re-admission back to zone europe-west2-b allowing accumulated job backlogs to clear smoothly. * **20 Oct 04:11 US/Pacific (12:11 BST)** **\-** Google Cloud Platform services and APIs were made fully available to customers. Some Google Compute Engine virtual machines were still not yet available. * **20 Oct 04:29 US/Pacific (12:29 BST) \-** Regional services and backend compute management systems were fully undrained, marking the end of core platform-level disruption. * **20 Oct 05:08 US/Pacific (13:08 BST) Majority Workload Recovery** **\-** GCE virtual machines were 99.5% operational and healthy, and creating new VMs was fully supported. Service availability was restored for most customer workloads, with resolution confirmed for the majority of users across Google Cloud Platform services in the region. Following the recovery of a small tail of remaining isolated workloads, the closure notification for the incident was posted by 07:03 US/Pacific (15:03 BST). Google is committed to preventing a repeat of this issue in the future and is completing the following actions: **Data Center Action Items:** * Restoration of normal utility configuration (both A & B feeds) * Utility provider to locate the damaged cable fault, using low-frequency radar penetration testing procedures. **\[Completed 26 Oct\]** * Utility provider to send on-site engineers to repair the cable fault and restore the impacted primary utility feed A source. **\[Estimated Completion Date 30 Oct\]** * Onsite Operations teams with a controlled method of procedure (MOP) to transfer the facility to its primary utility source (feeds A and B) from standby utility feed through coordinated switching with the utility provider **\[Estimated Completion Date 31 Oct\]** * Generator confidence testing * Full generator load transfer tests with utility power cutover of the active utility feed. Test automatic startup of generators through PLC signals within the backup battery timer and detailed review of backup procedures **\[Completed on 20 Oct and 26 Oct (full critical load transfer test including updated EOPs)\]** * Full generator load transfer tests in coordination with the primary utility source feeds (A and B) after restoration work completed by the primary utility provider. **\[Estimated Completion Date 31 Oct\]** * PLC configuration fix  * Reconfigured and validated the PLC after the outage on 20 Oct and then again on 26 Oct **\[Completed 26 Oct\]** * Google engineers to work in collaboration with the facility vendor teams to perform a comprehensive PLC code review and system resiliency to multiple failure scenarios. **\[Estimated Completion Date (prior to generator transfer test) estimated 31 Oct\]** * Validate PLC telemetry once primary utility feed A and B lineup is restored. **\[Estimated Completion Date 31 Oct\]** * Validate global PLC configurations at all global sites with similar topologies and PLC manufacturers, to ensure confidence in automatic generator starts. **\[Estimated Completion Date 15 Nov\]** * Emergency Operating Procedures (EOP) documentation update: * Comprehensive update to the EOP for site’s response to unexpected loss of active utility source. Update includes \- manual steps to attempt to restore active utility feed, manual restart of generators and manual transfer to other utility sources within the UPS battery run time. **\[Completed 26 Oct\]** * Ensure updated EOP is practiced twice per shift by on-site facility team. **\[Completed 24 Oct and checked with Google DC Operations daily\]** * Strengthen change management:  * Freeze planned maintenance activities at other sites with similar topologies, and implement elevated approvals and reviews for data center configuration changes which are outside their standard designs. **\[Estimated Completion Date 30 Oct\]** **Cloud Service Action Items:** * **Communications Enhancement:** Bolster notification speed by developing an automated alert-to-communication mechanism for location-impacting incidents. * **Platform Testing:** Expand platform-wide testing outcomes for infrastructure-level events. ### **Detailed Description of Impact** Between Monday, 19 Oct 2026, 23:00 US/Pacific (Tuesday, 20 Oct 2026, 07:00 BST) and Tuesday, 20 Oct 2026, 05:08 US/Pacific (13:08 BST), customers utilizing Google Cloud Platform services in the europe-west2 region experienced service disruptions across two consecutive phases, lasting a total duration of 6 hours, 08 minutes. During the initial phase from 23:00 to 04:29 US/Pacific (07:00 to 12:29 BST) (duration 5 hours, 29 minutes), customers experienced unavailability of zone-scoped resources in products, including: * **Compute Engine** \- VM instances, zonal MIGs, unmanaged instance groups, zonal NEGs, sole-tenant node groups, zonal reservations, target instances, zonal API operations.  * **Persistent Disk / Hyperdisk** \- Zonal PD, zonal Hyperdisk, Hyperdisk storage pools, instant snapshots. * **GKE \-** Zonal clusters (control plane), node pool nodes in \-b, PVs on zonal disks. * **Cloud SQL \-** Non-HA instances, read replicas in \-b. * **AlloyDB \-** Basic (non-HA) primaries in \-b. * **Bigtable \-** Single-cluster instances in \-b. * **Other products with affected zonal resources:** Cloud Batch, Cloud Build, Cloud Storage, Cloud Workstations, Composer, Dataproc, Filestore, Managed Lustre, Migrate to VMs, NetApp Volumes, Pub/Sub Lite, Vertex AI Workbench, VMware Engine. The unavailability of those resources scoped to a zone that undergoes disruption is working within the design of a zonally-scoped system. Requests made to these resulted either in a timeout or error code during the disruption. Any workloads and resources hosted entirely within europe-west2-b became unreachable due to this event. Google Compute Engine's zonal resources such as VMs require customers to provision failover or cross-zone recovery resources if needed, and to set up a recovery mechanism that matches their needs. Some failovers were unsuccessful due to capacity constraints and difficulty in replicating the underlying storage mechanism.  Following platform service restoration, some customer workloads running on Compute Engine instances as well as products that rely on Compute Engine experienced a longer recovery. By 04:46 US/Pacific (12:46 BST) new Virtual Machine creation resumed and by 05:08 US/Pacific (13:08 BST) over 99% of Compute Engine Virtual Machines were in a healthy state. Any remaining customers that were experiencing Virtual Machine problems were directed to file a customer support case as per normal procedure. While the physical power outage was isolated strictly to data center facilities in zone europe-west2-b, some customers running workloads in unimpacted zones (europe-west2-a and europe-west2-c) or across regional architectures also experienced unexpected impact. The primary causes of impact outside of zone europe-west2-b were: 1\) Instantaneous demand surges on neighboring zones (a and c) and 2\) Control-plane dependencies across zonal boundaries Affected products included: AlloyDB, Apigee Infra and Apigee Edge, BigQuery, Cloud Dataflow, Cloud Pub/Sub, Cloud SQL, Google Compute Engine, Google Kubernetes Engine, Looker, Regional Persistent Disk, Vertex AI Prediction, and Cloud Speech-to-Text. These services experienced unexpected degradation and failover issues driven by sudden compute capacity exhaustion from surging demand, and control-plane API timeouts. Customers would have experienced the inability to create, update, or delete some regional resources during this period. This was not a full regional control-plane outage, but certainly a degraded state. Multi-zonal and regional services that spanned across the europe-west2 region experienced elevated latency, transient API errors (such as HTTP 500 and 503 errors), and task admission queuing as failover traffic concentrated onto unimpacted regional resources and cross-zone calls to offline components timed out.  Storage write operations in the region experienced a transient error rate during the initial failover period, and regional query admission queues temporarily peaked before rapidly subsiding as capacity re-balanced. We did not identify any impact of the outage outside of the europe-west2 region. The following Google Cloud Platform services experienced impact within europe-west2: * AlloyDB for PostgreSQL * Apigee * BigQuery Data Transfer Service * Cloud Data Fusion * Cloud Filestore * Cloud Firestore * Cloud Load Balancing * Cloud Memorystore * Cloud NAT * Cloud Run * Cloud Spanner * Cloud Workstations * Datastream * Dialogflow CX * Google App Engine * Google BigQuery * Google Cloud Bigtable * Google Cloud Dataflow * Google Cloud Dataproc * Google Cloud NetApp Volumes * Google Cloud Pub/Sub * Google Cloud SQL * Google Cloud Storage (GCS) * Google Compute Engine (GCE) * Google Kubernetes Engine (GKE) * Google SecOps (Security Information and Event Management \[SIEM\] and Security Orchestration, Automation, and Response \[SOAR\]) * Looker (Google Cloud core) * Looker Studio * Managed Airflow (Google Cloud Composer) * Managed Service for Apache Kafka * Memorystore for Memcached * Memorystore for Redis * Memorystore for Redis Cluster * Memorystore for Valkey * Network Connectivity Center * Persistent Disk * Private Service Connect * Speech-to-Text * Virtual Private Cloud (VPC) * VMWare engine ----------

    公式のインシデント更新を自動翻訳しています。

    Google Cloud Storage(GCS)のお客様は、アップロードまたは書き込み操作を実行すると、高レイテンシーとエラー率が向上しました.

    開始 2026年10月8日 11:00 UTC · 1d 5h

    Outage重大なインシデント
    1. 2026年10月8日 18:24 UTCresolved

      **概要** Googleクラウドストレージの顧客は、アップロードまたは書き込み操作を実行すると、レイテンシーとエラーレートが上昇している **記述** 2026-10-08 05:19 PDT は、Google Cloud Storage で始まる問題が発生しています。 当社のエンジニアリングチームは、問題を調査し続けています。 2026-10-08 11:50 PDT による更新を現在の詳細に提供します。 **顧客症状** * アップロードや書き込み操作を実行すると、高レイテンシーやエラー率が高まっています。 * 読み取り操作の小さなサブセットもレイテンシーとエラーの増加を経験する可能性があります **ワークアラウンド** 今回は、.

    2. 2026年10月8日 18:34 UTCresolved

      **概要** Googleクラウドストレージの顧客は、アップロードまたは書き込み操作を実行すると、レイテンシーとエラーレートが上昇している **記述** 2026-10-08 05:19 PDT は、Google Cloud Storage で始まる問題が発生しています。 当社のエンジニアリングチームが実施する初期の緩和は、内部監視における誤差率の改善を観察可能としています。 作業は、さらなる緩和をロールアウトするために進行中です。 2026-10-08 12:00 PDTのアップデートは、最新の内容で行います。 **顧客症状** * アップロードや書き込み操作を実行すると、高レイテンシーやエラー率が高まっています。 * 読み取り操作の小さなサブセットもレイテンシーとエラーの増加を経験する可能性があります **ワークアラウンド** 今回は、.

    3. 2026年10月8日 18:55 UTCresolved

      **概要** Googleクラウドストレージの顧客は、アップロードまたは書き込み操作を実行すると、レイテンシーとエラーレートが上昇している **記述** 2026-10-08 05:19 PDT は、Google Cloud Storage で始まる問題が発生しています。 当社のエンジニアリングチームが実施する初期の緩和は、内部モニタリングの誤り率が10:57 PDTの低下を観察可能としています。 作業は、さらなる緩和をロールアウトするために進行中です。 2026-10-08 12:45 PDT による更新を予定しています。 **顧客症状** * アップロードや書き込み操作を実行すると、高レイテンシーやエラー率が高まっています。 * 読み取り操作の小さなサブセットもレイテンシーとエラーの増加を経験する可能性があります **ワークアラウンド** 今回は、.

    4. 2026年10月8日 19:38 UTCresolved

      **概要** Googleクラウドストレージの顧客は、アップロードまたは書き込み操作を実行すると、レイテンシーとエラーレートが上昇している **記述** 2026-10-08 05:19 PDT がスタートした、Google Cloud Storage での問題点を緩和し続けています。 エンジニアリングチームによる初期の緩和は、エラー率の不安定な改善を引き続き示します。 当社のエンジニアリングチームは、積極的に環境を監視し、サービスを完全に安定させるためにさらなる緩和を転がします。 2026-10-08 14:00 PDT にて、更新を致します。 **顧客症状** * アップロードや書き込み操作を実行すると、高レイテンシーやエラー率が高まっています。 * 読み取り操作の小さなサブセットもレイテンシーとエラーの増加を経験する可能性があります **ワークアラウンド** 今回は、.

    5. 2026年10月8日 20:48 UTCresolved

      **概要** Googleクラウドストレージの顧客は、アップロードまたは書き込み操作を実行すると、レイテンシーとエラーレートが上昇している **記述** 2026-10-08 05:19 PDT がスタートした、Google Cloud Storage での問題点を緩和し続けています。 エンジニアリングチームによる初期の緩和は、エラー率の不安定な改善を引き続き示します。 当社のエンジニアリングチームは、積極的に環境を監視し、サービスを完全に安定させるためにさらなる緩和を転がします。 2026-10-08 16:00 PDT のアップデートは、最新の内容で行います。 **顧客症状** * アップロードや書き込み操作を実行すると、高レイテンシーやエラー率が高まっています。 * 読み取り操作の小さなサブセットもレイテンシーとエラーの増加を経験する可能性があります **ワークアラウンド** 今回は、.

    6. 2026年10月9日 16:44 UTCresolved

      ## 予備事件報告 皆様のお越しをお待ちしております。 Google Cloudに頼るほどの頻度を把握し、生産性への影響を後悔します。 根本原因に対処し、これから起こることを防ぎます。 なお、この情報は投稿時に最高の知識に基づいており、調査が継続して変更される場合があります。 調査が完了すると、予防措置による最終事件報告が掲載されます。 以下に示されているもの以外に影響を経験した場合は、Google Cloudサポート(https://cloud.google.com/support)にてご連絡ください。 ## 発行日/時刻(米国/太平洋時間) 開始日: 2026年10月08日 04:00 出典:10月08日 2026 16:30 所要時間:12時間30分 ## 概要 2026年10月08日(木)、Google Cloud Storageは、書き込みレイテンシを高め、12時間30分の間、当社中央1地域にエラーレートを書き込みました。 私たちは、このことが再び起こらないことを確実にするために、すぐに手順を取っています。 ## 予備ルート原因 Google Cloud Storageは、高度に分散したバックエンドアーキテクチャに依存して、データを処理および保存します。 インシデント ウィンドウでは、弊社 セントラル 1 領域内の特定のストレージ バックエンド ノードがローカライズされた容量の不足を経験しました。 顧客のインパクトにつながるイベントのシーケンスは以下の通りです。 * 局所的な容量制限に対処するためのトラフィックソート最適化は、影響を受けた領域の特定のバックエンドストレージノードに対する厳しいリソースの排気を引き起こしました。 *このリソースの排気は、オブジェクトデータを処理するバックエンドサービスがタイミングを出すことを引き起こしました。 * その結果、これらのノードにルーティングされたアップロードと書き込みのリクエストは、高レイテンシを経験し、完了できなかったため、エラーは顧客に直面しました。 ※現在、インシデントウィンドウの部分にメタデータ処理エラーを追加したデータベースサービスに関する個別の問題が発生しました。 Google のエンジニアは完全な根本的な原因の分析(RCA)を始め、利用できると付加的な情報を提供します。 ## 修正 問題は、初期にGoogleエンジニアリングチームが、インシデントウィンドウの初期にシステムテレメトリーを積極的に監視することで検出されました。 問題を軽減するために、Google エンジニアは次のステップバイステップ戦略を実行しました。 * エンジニアは、当初は、影響を受ける地域に追加の緊急能力を動的に割り当てようと試みたが、これは体系的な地域容量制限によってブロックされた。 * 即時圧力を緩和するために、エンジニアは、最も積み過ぎたバックエンドストレージノードから選択的にトラフィックを排出します。 * 設定変更は、トラフィックソートの最適化を無効にするために展開され、ストレージのバックエンドにリソースのオーバーヘッドを大幅に削減しました。 *同時メタデータの問題については、エンジニアが最新のメタデータデータベースサービスに更新をロールバックしました。 トラフィックレベルが安定し、リソース利用が通常のベースラインレベルに戻ったら、以前のドレンドノードはアクティブサービスに復元され、通常の操作を正常に復元しました。 ## 影響の記述 2026年10月08日、04:00~16:30 US/Pacific では、クラウドストレージのアップロードと書き込み操作中に、当社に分散したレイテンシとエラー率を上げることができました。 * 主に、LakeObject 操作とクライアント側のタイムアウトに HTTP 503 のエラーが認められている。 ※この時間枠内での読み取り操作にも若干の影響が認められました。 ※他の地域におけるクラウドストレージの運用、その他全てのGoogleクラウドサービスが、この特定のイベントに影響を受けていないこと.

    7. 2026年10月14日 7:15 UTCresolved

      #事件報告 ## 発行日/時刻(米国/太平洋時間) **事件第一発事故** 開始日: 2026年10月08日 04:00 出典:10月08日 2026 16:30 所要時間:12時間30分 **事件再発** 再発開始: 09 10月 2026 04:05 再発終了: 09 10月 2026 09:46 所要時間: 5時間41分 **総所要時間:** 18時間、11分 ## 概要 2026年10月08日(木)、Google Cloud Storageは、書き込みレイテンシを高め、エラーレートを書き込み、アップロードまたは書き込みを実行し、12時間30分間隔で1地域に作業を書き込みました。 これは、金曜日に再発され、09 10月2026日、5時間、41分の間、私たち-central1-bゾーンで。 私たちは、このことが再び起こらないことを確実にするために、すぐに手順を取っています。 ## 根本原因 Google Cloud Storageは、高度に分散したバックエンドアーキテクチャに依存して、データを処理および保存します。 インシデント・ウィンドウでは、トラフィックの増加により、特定のストレージ・バックエンド・ノードがローカライズされた容量の不足を経験しました。 顧客のインパクトにつながるイベントのシーケンスは以下の通りです。 * Google Cloud ストレージ ロード バランス レイヤーに最適化設定の更新をソートするトラフィックは、ローカライズされた容量の制約に対処するために意図した、影響を受ける領域の特定のストレージ バックエンド ノードの厳しいリソースの排気を引き起こし、標準のキャパシティ アウェア ルーティング ロジックを迂回し、深刻な負荷の不均衡をもたらします。 * したがって、当社の中央部1領域のストレージバックエンドノードの小さな分数が、利用可能な容量が低いにもかかわらず、着信書き込みトラフィックの圧倒的な割合を受け取った。 このトラフィックの集中は、影響を受けたバックエンドサーバーのリソース排気につながり、バックエンドサービスがオブジェクトデータを処理し、タイミングをとり始めます。 * アンダーリングインスタンスは、リクエストの大量処理を素早く処理できないため、これらのノードにルーティングされたリクエストのアップロードと書き込みは、レイテンシが上昇し、完了できなかったため、エラーが発生しました。 ※現在、インシデントウィンドウの部分にメタデータ処理エラーを追加したデータベースサービスに関する個別の問題が発生しました。 *10月9日の発行の再発は、アップロードプランナー機能の不完全なロールバックによって引き起こされ、負荷分散機構を破り、数少ないストレージバックエンドノードをオーバーロードしました。 ## 是正と予防 問題は、当初は、インシデントウィンドウの初期にシステムテレメトリーを監視し、Google エンジニアリングチームによって、08 10 月 2026 日に検出されました。 問題を軽減するために、Google エンジニアは次のステップバイステップ戦略を実行しました。 * エンジニアは、当初は、影響を受ける地域に追加の緊急能力を動的に割り当てようと試みたが、これは体系的な地域容量制限によってブロックされた。 * 即時圧力を緩和するために、エンジニアは、最も積み過ぎたストレージバックエンドノードから選択的にトラフィックを排出します。 * 設定変更は、トラフィックソートの最適化を無効にするために展開され、ストレージのバックエンドにリソースのオーバーヘッドを大幅に削減しました。 *同時メタデータの問題については、エンジニアが最新のメタデータデータベースサービスに更新をロールバックしました。 * これらの手順は一時的な救済を提供しましたが、負荷不均衡の再発は、さらなるトラフィックのリダクションと影響を受けたストレージコンポーネントのドレインが必要です。 エンジニアリングが完全に問題のある負荷分散設定の変更を反転させたときに、インシデントは完全に解決され、以前のキャパシティ・アウェア・ルーティングの動作を回復し、トラフィックが地域全体に均等に分配できるようにしました。 トラフィックレベルが安定し、リソース利用が通常のベースラインレベルに戻ったら、以前のドレンドノードはアクティブサービスに復元され、通常の操作を正常に復元しました。 **予防措置:** この問題が再発しない場合は、次の改善を実施します。 - **安全構成ロールアウト:** デプロイメントプロトコルを更新し、バランシングロジックの変更が、より大きく、高度に活用された領域にロールアウトされる前に、代替、より小さな領域で厳格に検証されるようにします。 - **理性的な操作制御:** ストレージの負荷分散アーキテクチャを強化し、容量の制約を厳密に強化し、トラフィックの配分ロジックは、十分なサービングリソースが不足しているクラスターへの事前の特定保護とルートのトラフィックを迂回できないことを保証します。 - **弾性スケーリングロジック:** 当社は、高度に活用されたストレージセル内で内部データの移動を加速するために、標的改善を実施し、より効率的にデータを処理し、より大きなレジリエンスで一時的な負荷スパイクを処理することを可能にします。 ## 影響の記述 2026年10月08日,04:00から16:30まで,当社中央部1地域と09 October 2026,0405から0946まで,お客様はクラウドストレージのアップロードと書き込み操作中にレイテンシーとエラー率を高めた. * **アップロード&書き込み失敗:** 主に、LakeObject 操作とクライアント側のタイムアウトに HTTP 503 のエラーが認められました。 *** 書き込みレイテンシーの増加:** 通常のものよりも大幅に高いレイテンシーを経験した成功した操作を書きます。 ※他の地域におけるクラウドストレージの運用、その他全てのGoogleクラウドサービスが、この特定のイベントに影響を受けていないこと.

    公式のインシデント更新を自動翻訳しています。

    弊社-central1-b の複数の製品がネットワークサービス劣化を経験しています.

    開始 2026年9月1日 14:42 UTC · 4h 10m

    Issues軽微なインシデント
    1. 2026年9月1日 16:03 UTCresolved

      **概要** 弊社-central1-b の複数の製品がネットワークサービス劣化を経験しています。 **記述** 2026-09-01 07:41 US/Pacific からネットワークの問題が発生しています。 問題は、私たち-central1-b ゾーンの一部に影響を与える. 地域の残りの地帯は影響を受けません。 当社のネットワークエンジニアリングチームは、緩和に取り組んでおり、復旧するサービスが見られます。 2026-09-01 09:30 US/Pacific の詳細は、火曜日、2026-09-01 09:30 までご案内いたします。 被災された皆様、お詫び申し上げます。 **顧客症状** パケットの損失やエラーが高まっています。 * ビッグクエリ *クラウドデータフロー * クラウドSQL *アプリエンジン * クラウドラン * 合金DB * クラウド ビッグテーブル * クラウドスパナー * 計算エンジン *クラウドVPN *クラウド相互接続 * クラウドNAT *クラウドファイルストア *クラウドハイブリッドコネクティビティ * バーチャルプライベートクラウド * Google Kubernetesエンジン ※Looker(Googleクラウドコア) **ワークアラウンド** ※サービスレイヤーのレトリーをお持ちのお客様は、ゾーンの部分のみが影響を受けているため、正常に完了する場合があります。 ※重度に影響を受けているお客様と、代替ゾーンで利用できるサービスがあるお客様は、代替ゾーンに失敗することができます.

    2. 2026年9月1日 16:19 UTCresolved

      **概要** 弊社-central1-b の複数の製品がネットワークサービス劣化を経験しています。 **記述** 問題は、私たち-central1-b ゾーンの一部に影響を与える. 地域の残りの地帯は影響を受けません。 ネットワークレベルの緩和の取り組みに続いて、基礎となるネットワークインフラは完全に回復しました。 クラウド上の製品エンジニアリングチームは、現在、個々のサービスの回復状況を検証しています。 2026-09-01 10:00 US/Pacific より詳しい情報をお届けいたします。 **顧客症状** パケットの損失やエラーが高まっています。 * ビッグクエリ *クラウドデータフロー * クラウドSQL *アプリエンジン * クラウドラン * 合金DB * クラウド ビッグテーブル * クラウドスパナー * 計算エンジン *クラウドVPN *クラウド相互接続 * クラウドNAT *クラウドファイルストア *クラウドハイブリッドコネクティビティ * バーチャルプライベートクラウド * Google Kubernetesエンジン ※Looker(Googleクラウドコア) *アピジー * GoogleのSecOps SOAR **ワークアラウンド** ※サービスレイヤーのレトリーをお持ちのお客様は、ゾーンの部分のみが影響を受けているため、正常に完了する場合があります。 ※重度に影響を受けているお客様と、代替ゾーンで利用できるサービスがあるお客様は、代替ゾーンに失敗することができます.

    3. 2026年9月1日 17:09 UTCresolved

      **概要** 弊社-central1-b の複数の製品がネットワークサービス劣化を経験しています。 **記述** 問題は、私たち-central1-b ゾーンの一部に影響を与える. 地域の残りの地帯は影響を受けません。 ほとんどの製品は回復し、エンジニアリングチームは依然としていくつかの残りの製品への影響を検証しています。 2026-09-01 11:00 US/Pacific の詳細は、火曜日にお知らせ致します。 **顧客症状** パケットの損失やエラーが高まっています。 * クラウドラン *アプリエンジン 次の商品が回復しました * ビッグクエリ *クラウドデータフロー * クラウド ビッグテーブル * 計算エンジン *クラウドハイブリッドコネクティビティ *クラウドファイルストア * バーチャルプライベートクラウド * クラウドスパナー * Google Kubernetesエンジン * クラウドSQL * 合金DBCloud VPN *アピジー *クラウド相互接続 * クラウドNAT ※Looker(Googleクラウドコア) * GoogleのSecOps SOAR * クラウドファイヤーストア **ワークアラウンド** ※サービスレイヤーのレトリーをお持ちのお客様は、ゾーンの部分のみが影響を受けているため、正常に完了する場合があります。 ※重度に影響を受けているお客様と、代替ゾーンで利用できるサービスがあるお客様は、代替ゾーンに失敗することができます.

    4. 2026年9月1日 18:01 UTCresolved

      **概要** 弊社-central1-b の複数の製品がネットワークサービス劣化を経験しています。 **記述** 問題は、私たち-central1-b ゾーンの一部に影響を与える. 地域の残りの地帯は影響を受けません。 ほとんどの製品は回復し、エンジニアリングチームは依然としていくつかの残りの製品への影響を検証しています。 ルーチンネットワークのメンテナンスは、us-central1-b で問題を引き起こしました。 弊社では、すべてのゾーナルサービスおよび地域サービスに影響を及ぼし、復元されたネットワーク容量を回復しました。 積極的な監査が行われている間、地域におけるメンテナンスが停止しました。 2026-09-01 火曜日、2026-09-01 12:30 アメリカ/太平洋の最新情報をお届けします。 **顧客症状** パケットの損失やエラーが高まっています。 * クラウドラン *アプリエンジン 次の商品が回復しました * ビッグクエリ *クラウドデータフロー * クラウド ビッグテーブル * 計算エンジン *クラウドハイブリッドコネクティビティ *クラウドファイルストア * バーチャルプライベートクラウド * クラウドスパナー * Google Kubernetesエンジン * クラウドSQL * 合金DBCloud VPN *アピジー *クラウド相互接続 * クラウドNAT ※Looker(Googleクラウドコア) * GoogleのSecOps SOAR * クラウドファイヤーストア **ワークアラウンド** ※サービスレイヤーのレトリーをお持ちのお客様は、ゾーンの部分のみが影響を受けているため、正常に完了する場合があります.

    5. 2026年9月1日 18:36 UTCresolved

      **概要** 弊社-central1-b の複数の製品がネットワークサービス劣化を経験しています。 **記述** 問題は、私たち-central1-b ゾーンの一部に影響を与える. 地域の残りの地帯は影響を受けません。 製品のほとんどが回復しました。 影響を受けた製品 クラウドランとアプリエンジンも回復を見ていると、エラーは、事前にインシデントレベルを下げています。 エンジニアリングは、監視および検証を継続します。 ルーチンネットワークファブリックパスメンテナンスは、私たち-central1-bの2つのクラスターで予期しない問題を引き起こしました。 弊社では、すべてのゾーナルサービスおよび地域サービスに影響を及ぼし、復元されたネットワーク容量を回復しました。 積極的な監査が行われている間、地域におけるメンテナンスが停止しました。 2026-09-01 火曜日、2026-09-01 12:30 アメリカ/太平洋の最新情報をお届けします。 **顧客症状** パケットの損失やエラーが高まっています。 * クラウドラン *アプリエンジン 次の商品が回復しました * ビッグクエリ *クラウドデータフロー * クラウド ビッグテーブル * 計算エンジン *クラウドハイブリッドコネクティビティ *クラウドファイルストア * バーチャルプライベートクラウド * クラウドスパナー * Google Kubernetesエンジン * クラウドSQL * 合金DBCloud VPN *アピジー *クラウド相互接続 * クラウドNAT ※Looker(Googleクラウドコア) * GoogleのSecOps SOAR * クラウドファイヤーストア **ワークアラウンド** ※サービスレイヤーのレトリーをお持ちのお客様は、ゾーンの部分のみが影響を受けているため、正常に完了する場合があります.

    6. 2026年9月1日 19:12 UTCresolved

      **概要** 弊社に複数の製品-central1-b 経験豊富なネットワークサービス劣化。 **記述** 問題は、私たち-central1-b ゾーンの一部に影響を与えました。 地域の残りの地帯は影響を受けていませんでした。 インパクトのある製品はすべて回収されています。 予備分析から、ルーチンネットワークファブリックパスメンテナンスは、私たち-central1-bの1つのクラスターで予期しない問題を引き起こしました。 弊社では、すべてのゾーナルサービスおよび地域サービスに影響を及ぼし、復元されたネットワーク容量を回復しました。 積極的な監査が行われている間、地域におけるメンテナンスが停止しました。 問題の解決に取り組んでいる間、あなたの忍耐に感謝します。 **顧客症状** 顧客によって高められたパケット損失および間違いを経験しました。 **ワークアラウンド** 問題は緩和されています.

    7. 2026年9月3日 17:47 UTCresolved

      ## 予備事件報告 皆様のお越しをお待ちしております。 Google Cloudに頼るところが分かち、環境への影響を後悔しています。 根本原因に対処し、これから起こることを防ぎます。 なお、この情報は投稿時に最高の知識に基づいており、調査が継続して変更される場合があります。 調査が完了すると、予防措置による最終事件報告が掲載されます。 以下に記載されたもの以外に影響を受けた場合、https://cloud.google.com/support を使用して Google Cloud サポートにご連絡ください。 ## 発行日/時刻(米国/太平洋時間) **事件開始**: 1 9月2026 07:41 **事件**: 1 9月2026 11:52 **期間**:4時間11分 ## 概要 2026年9月1日(火)に、弊社中央1-bの経験豊富なネットワークサービス分解と4時間と11分の間、インスタンス分離の顧客があります。 万が一、この中、事業が影響を受けたお客様には、誠意をもってお詫び申し上げます。 これは、私たちがあなたに提供するように努力する品質と信頼性のレベルではありません、そして私たちは、プラットフォームのパフォーマンスと可用性を向上させるためにすぐにステップをとっています。 ## 予備ルート原因 このでき事のための即時の技術的な制動機は日常的なハードウェア維持のプロシージャの間にネットワーク繊維の光学ケーブルの不変な物理的接続でした。 エンジニアは、データセンタールータの容量の分数をサポートするスケジュールされた容量のアップグレードを実行しました。 各データセンターのネットワークアーキテクチャは、複数のルーティングデバイス間で冗長で設計されています。 システムは、すべてのデバイスまたはファイバーパスの故障に弾力性があり、ほとんどの二重または三重の失敗は、顧客のトラフィックに影響を与えません。 これにより、デバイスとファイバーパスは、各データセンターで物理的に分離され、多様な電源が利用できます。 手続き上のエラーは、物理的なメンテナンスアクションが13分以内にすべてのデバイスを渡る繊維パスの100%を連続的に無効化することを意味します。 エラーの性質, アクションの速度と組み合わせ, 完全な切断の前に、エンジニアに到達する誤ったアクションの警告を防ぐ. これにより、ネットワークから隔離されるインパクトのあるゾーンの計算能力が向上しました。 お客様が仮想マシンに到達できなかったため、その仮想マシンはゾーン外での接続を確立できませんでした。 ## 修正 問題は、ネットワークエンジニアリングおよびインシデント対応チームを急速に関与する自動ネットワーク損失監視システムおよび積極的なプローブによってすぐに検出されました。 即時の顧客への影響を軽減するために、エンジニアリングチームは、影響を受けたインフラからトラフィックを積極的に移動し、互換のワークロードトラフィックを自動的にシフトして、地域内の他の健康的な容量に移行します。 並行して、現場のハードウェア操作技術者は、切断された光学リンクを識別し、物理的に繊維を再確認しました。 物理的なリンクが完全に復元されたら、トラフィック・フロー・レートは正規化され、トラフィックはサービスに容量を返すためにリダイレクトされました。 ## 影響の記述 9月1日(火)、13時41分から11時52分まで、当社中央部1-bゾーンの一部が厳しいネットワークの劣化と資源の分離を経験した。 ***複数の製品の影響を受ける:** ネットワークの崩壊は、当社-central1-b の一部から、そのゾーンの一部の顧客に複数の GCP 製品に影響を与えました。 *** エラーレート:** 影響を受ける領域でホストされているリソースのトラフィックフローのドロップ率は、インシデントのピーク時に100%に達し、到達不能な仮想マシンとパケットロスが上昇しました。 **サービスおよび特徴** ※Google Compute Engine:**(Google Compute Engine:**) 仮想マシンを外部にアクセスでき、VM がリモートリソースに到達することができない。 ※Google Kubernetesエンジン:** 影響を受けた地帯内の到達不能な地方/動物クラスターおよびノードは、遅延したクラスターの回復時間を促します。 ***クラウドラン/Googleアプリエンジン:** バックエンドのワークロードとして一時的なレイテンシのスパイクと保留キューが自動的に避難し、健康な容量にシフトします。 特にインパクトのあるエリアのワークロードのサブセットは、米国/太平洋11:52まで劣化を経験しました。 ***Cloud SQL、PostgreSQL、Cloud Spanner、Google Cloud Bigtable、クラウドファイルストアのAlloyDB:** 影響を受けたインフラに厳密にローカライズされたインスタンスのデータアクセスと接続が厳しく重度されます。 ***仮想プライベートクラウド(VPC)、クラウドNAT、Apigee、Google BigQuery、Google Cloud Dataflow、Looker、Google SecOps SOAR、ハイブリッドコネクティビティ、クラウドインターコネクト:** ネットワークパケットの損失、コネクティビティの低下、および影響を受ける領域における API のタイムアウトの増加.

    8. 2026年9月10日 21:20 UTCresolved

      #事件報告 ## 概要 2026年9月1日(火)に、弊社が開発したネットワークサービスの劣化や、4時間と11分の間、インスタンスの隔離を経験したお客様もいます。 万が一、この中、事業が影響を受けたお客様には、誠意をもってお詫び申し上げます。 これは、私たちがあなたに提供するように努力する品質と信頼性のレベルではありません、そして私たちは、プラットフォームのパフォーマンスと可用性を向上させるためにすぐにステップをとっています。 ## 根本原因 ルーチンハードウェアのメンテナンス中にネットワークの光ファイバーケーブルの不変な物理的接続によってイベントがトリガーされました。 技術者は、データセンターのルータにスケジュールされた容量のアップグレードを実行しました。これは、私たち-central1-b ゾーンの容量の分数と、私たち-central1-f ゾーンの容量の小さな分数をサポートするものです。 ハンドオンのメンテナンス中、データセンタールータをネットワークファブリックに接続する光ファイバーは、プラグを外し、光学トランシーバーは、高密度接続をサポートするトランシーバーに交換されました。 トランスシーバは、データセンターの布地にはまだトランスシーバと互換性がないため、各繊維の接続の損失を引き起こします。 ネットワークは、同じ建物内の別のデータセンタールーム内の冗長ルータで設計されており、1つのルータの故障がサービスを停止しません。 メンテナンスは、ネットワークが完全に接続された状態に戻ったステップ間で、各ステップでトラフィックの分散と検証で、数日以上1つのルーターをアップグレードすることを意図しました。 しかし、手動でオーケストレーションされたアップグレードプロセスの手続き上のエラーは、すべてのルータ間でトランシーバーの交換の完全なリストが一度に作業1ルータをシーケンスするための指示なしに技術者に発行されることを引き起こしました。 また、メンテナンスワークフローには、意図しない混乱を検出するための期待された人間とソフトウェア検証の手順も含まれていません。 その結果、技術者は、影響を受けたデバイスを13分以内に横断して、すべての繊維のパスを連続的に無効にします。 エラーのスピードと性質は、接続が失われる前に、エンジニアに到達することから誤った行動の警告を防止しました。 また、プラグを抜いた後、光が任意の光ファイバ光学ケーブルで検出された場合、停止するスタンディング手順が続いていません。 これにより、ネットワークから隔離されるインパクトのあるゾーンの計算能力が向上しました。 お客様が仮想マシンに到達できなかったため、その仮想マシンはゾーン外での接続を確立できませんでした。 ## 是正と予防 問題は、ネットワークエンジニアリングおよびインシデント対応チームを急速に関与する自動ネットワーク損失監視システムおよび積極的なプローブによってすぐに検出されました。 即時顧客のインパクトを緩和するために、エンジニアリングチームは、インパクトのあるインフラからトラフィックを積極的に移動させました。 並行して、現場のハードウェア操作技術者は、切断された光学リンクを特定し、物理的に元の光学トランシーバーを再考しました。 物理的なリンクが完全に復元されたら、トラフィック・フロー・レートは正規化され、トラフィックはサービスに容量を返すためにリダイレクトされました。 Googleは、将来的にこの問題の繰り返しを防止し、次の操作を完了することを約束します。 ※当社の地域におけるトレーニングを強化し、安全維持技術を中心にグローバルに強化します。これらには、光があらゆる非可燃繊維にあるかどうかを検証するための必須要件が含まれます。 *ネットワークアップグレードワークフローの移行を完全に自動でシーケンスされたオーケストレーションシステムに完了します。 2025年に完成した最も一般的な地域のネットワークワークフローは、ズームワークフローが進行しています。 ※Googleデータセンターのライブファイバケーブルを断ち切って動作を停止する作業の展開を完了します。 * 障害ゾーンから地域のトラフィックを離れた場所に移動する自動システムの導入を完了し、このインスタンスの約19分から約5分です。 ## 影響の詳細な説明 9月1日(火)、13時41分から11時52分までの間、当社と当社を中心とする分散型1-bの部分は、厳しいネットワークの劣化と資源分離を経験した。 1. 影響を受ける複数の製品:ネットワークは、当社-central1-b と us-central1-f の領域の一部から/に破壊され、これらのゾーンの一部の顧客に対して、すべてのゾーナル GCP 製品に影響を与えました。 2. 地域影響:影響を受けたデータセンターの容量を使用して地域産物は、交通の多様化が完全に08:00米国/太平洋に行われたまで影響を受けました。 Google Kubernetesエンジンとクラウドラン/Googleアプリエンジンは、以下に議論し、もはや影響を受けていました。 3. 間違い率:影響を受けた区域でホストされる資源のための交通流れの低下率は事故のピークの間に100%に達し、到達不能な仮想機械および高められたパケット損失をもたらしました。 **サービスおよび特徴** * Google Compute Engine: 仮想マシンを外部にアクセスするためのus-central1-bおよびus-central1-fゾーンの影響を受けた部分のユーザの Inability、およびVMのリモートリソースへのアクセス不能。 * PostgreSQL、Google Cloud Bigtable、クラウドファイルストア用のクラウドSQL、AlloyDB: データをアクセスし、影響を受けたインフラに厳密にローカライズしたインスタンスの接続が厳しくなります。 *クラウドスパーナー、クラウドファイヤーストア:関連するリモートプロシージャコール(RPC)エラーレート、書き込みタイムアウト、および衝撃されたゾーンで実行されるコンポーネントへの厳しい接続のために、ナム5マルチレギュレーションインスタンスのレイテンシースパイク。 *仮想プライベートクラウド(VPC)、クラウドNAT、Apigee、Google BigQuery、Google Cloud Dataflow、Looker、Google SecOps SOAR、ハイブリッドコネクティビティ、クラウドインターコネクト:ネットワークパケットの損失、コネクティビティの低下、および影響を受けたゾーンのAPIタイムアウトの増加。 * Google Kubernetes Engine(GKE):2026-09-01で07:40と0915 US/Pacificの間で、顧客はGKEクラスターコントロールプレーン(Kubernetes APIサーバー)へのリクエストに対するエラーとタイムアウトを経験しました。 これにより、スケジューリングとKubernetes APIの動作が失敗する、新規または更新されたワークロードが発生しました。 * クラウドラン/ Google App Engine: 一時的なレイテンシのスパイクとバックエンドのワークロードとしてベンドのキューは自動的に避難し、健康な容量にシフトします。 特にインパクトのあるエリアのワークロードのサブセットは、米国/太平洋11:52まで劣化を経験しました。 **顧客の影響** 特定の影響を受けたクラスターでホストされているリソースをお持ちのお客様には、弊社-central1-b および us-central1-f は、米国/太平洋07.41 からネットワーク接続の完全な損失を経験しました。 今回は、仮想マシンや関連サービスがインターネットと他のGoogleクラウドの領域から到達できないようになり、それらの内部リソースはアウトバウンド接続を開始できませんでした。 問題は、ほぼすぐに検出され、エンジニアは、地域製品への影響を減らすために、07:45と08:00米国/太平洋でトラフィックの分散アクションを取った。 太平洋8時50分までに、物理的な接続の大部分は復元され、トラフィックが回復し始め、トラフィックの多様化アクションは9時19分に削除されました。 ほぼすべての影響を受けたサービスおよび長期運用に関する完全な回復は、米国/太平洋11:52によって確認されました。 ネットワークの隔離は、私たち-central1-b と us-central1-f 内の特定のクラスターに厳密に制限されているため、マルチゾーンの展開は、私たち-central1 の他のゾーン間で冗長性を正しく活用して、物理的なハードウェアの故障を回避し、トラフィックを引き続きすることができました。 弊社-central1-b と弊社-central1-f のプロジェクトをお持ちのお客様は、多角的な影響が見つかりません。ほとんどのゾーンでは、影響を受けるデータセンターに容量がかかる場合があります.

    9. 2026年9月29日 16:09 UTCresolved

      ## Addendum to Incident Report This addendum extends the Detailed Description of Impact from the previous message. Though only two clusters in a datacenter in us-central1-b and us-central1-f experienced network isolation, a few regional products with a dependency on the affected datacenter were also affected. Between 07:41 and 11:52 US/Pacific on Tuesday, September 1, 2026, the following products were affected: - **Compute Engine VMs**: VMs running in the affected data center lost network connectivity to resources located outside of their datacenter. From a Compute Engine perspective, this incident only affected a subset of VMs in us-central1-b and us-central1-f. - **Zonal and Regional Products Based on Compute Engine** Products with dependencies on VMs in the affected datacenter experienced symptoms like connection timeouts or service unavailability because the underlying VMs lost network connectivity. Examples of products that are based on Compute Engine VMs include: Apigee, Cloud SQL, AlloyDB for PostgreSQL, Dataflow, Cloud Filestore, and Looker. - **Google Kubernetes Engine (GKE)**: GKE clusters whose control plane had dependencies on Compute Engine VMs in the affected clusters experienced errors and timeouts when administrators or nodes attempted to connect to the Kubernetes API server. Consequently, deployments might have been delayed, Kubernetes API operations might have failed, and new nodes might not have registered with the control plane (causing node pool operational delays). - **Cloud Run and App Engine:** Workloads in the us-central1 region experienced elevated serving latency, 5xx aborted request errors, and outbound connectivity degradation. To prevent severe request failures, traffic was diverted to other clusters. Diverting requests to other clusters temporarily caused elevated latency or errors in those clusters.Once the impacted cluster was restored, workload demand for these new backends created a 'thundering herd' of concurrent instance initializations. This sudden surge bypassed warm caches and overwhelmed internal file-serving tiers, extending symptoms until emergency capacity was provisioned. - **Other Google APIs and Services**, in us-central1 or a multi-region that includes us-central1, were affected if they had dependencies on software tasks in the affected clusters and weren't able to use software tasks in an unaffected cluster. Symptoms included connection timeouts or service unavailability. Examples of other Google APIs and services are: Google Cloud Bigtable, BigQuery, Google SecOps SOAR, Cloud Spanner, and Cloud Firestore. For some services, symptoms were limited to temporary latency spikes and service unavailability until workloads shifted to unaffected clusters. - **Private Service Connect**: Clients (in any region) experienced connectivity issues involving PSC endpoints with dependencies in us-central1, in specific circumstances: - PSC endpoints for Google APIs were affected in the same way as noted in the Google APIs and services section. - Producer/consumer PSC endpoints were affected if the producer had load balancers or backend VMs in the affected clusters of us-central1. - **Hybrid Connectivity**: Some Cloud Router, Cloud VPN, and Cloud Interconnect VLAN attachments in us-central1 were affected in specific circumstances: - Cloud Router BGP software tasks for some Cloud Routers in us-central1 experienced a Cloud Router maintenance event if their BGP software tasks were running in the affected clusters. - Cloud VPN tunnel software tasks running in the affected clusters lost network connectivity. This caused some Cloud VPN tunnels in us-central1 to go down until a replacement tunnel task in a different cluster was assigned. - Resources (in any region) sending packets through Cloud Interconnect VLAN attachments in us-central1 might have experienced intermittent connectivity issues in certain situations where network flows weren’t already programmed. - **Envoy-based load balancers and other products**: Load balancers and other products that depended on managed Envoy tasks of a proxy-only subnet in us-central1 experienced increased latency or connectivity issues if enough Envoy tasks were in the affected clusters. The following products were affected: - Regional external application load balancers in us-central1 - Regional internal application load balancers in us-central1 - Cross-region internal application load balancers with proxies in us-central1 - Regional external proxy network load balancers in us-central1 - Regional internal proxy network load balancers in us-central1 - Cross-region internal proxy network load balancers with proxies in us-central1 - Secure Web Proxy in us-central1

    公式のインシデント更新を自動翻訳しています。

    We are investigating an issue where customers may experience timeouts, service degradations, errors, and elevated latencies across multiple products in the us-west1 region.

    開始 2026年8月20日 15:40 UTC · 3h 40m

    Outage重大なインシデント
    1. 2026年8月20日 16:44 UTCresolved

      **Summary** We are investigating an issue where customers may experience timeouts, service degradations, errors, and elevated latencies across multiple products in the us-west1 region. **Description** We are experiencing an issue with multiple products, beginning on Thursday, 2026-08-20 08:40 PDT. Our engineering team continues to investigate the issue. We will provide an update by Thursday, 2026-08-20 10:30 PDT with details. We apologize to all who are affected by the disruption. **Diagnosis / Customer Symptoms** Customers in us-west1 may experience timeouts, service degradations, errors, and elevated latencies across multiple products. **Workaround** None at this time.

    2. 2026年8月20日 17:13 UTCresolved

      **Summary** We are investigating an issue where customers may experience timeouts, service degradations, errors, and elevated latencies across multiple products in the us-west1 region. **Description** Mitigation actions are implemented by our engineering teams, recovery trends have been observed across infrastructure layers. Active efforts remain underway to bring impacted cloud services back to full operation. We will provide an update by Thursday, 2026-08-20 10:45 PDT with details. **Diagnosis / Customer Symptoms** Customers in us-west1 may experience timeouts, service degradations, errors, and elevated latencies across multiple products. **Workaround** We recommend customers to failover to other regions where feasible.

    3. 2026年8月20日 17:32 UTCresolved

      **Summary** We are investigating an issue where customers may experience timeouts, service degradations, errors, and elevated latencies across multiple products in the us-west1 region. **Description** Mitigation actions are implemented by our engineering teams, recovery trends have been observed across infrastructure layers. Active efforts remain underway to bring impacted cloud services back to full operation. We will provide an update by Thursday, 2026-08-20 11:00 PDT with details. **Diagnosis / Customer Symptoms** Customers in us-west1 may experience timeouts, service degradations, errors, and elevated latencies across multiple products. **Workaround** We recommend customers to failover to other regions where feasible.

    4. 2026年8月20日 18:03 UTCresolved

      **Summary** The issue causing timeouts, degradations, errors, and latencies across multiple us-west1 products has been mitigated and we are working to recover all products. **Description** Mitigation actions have been completed by our engineering teams and we are seeing recovery from multiple products. We are continuing to work to recover the remaining products. We will provide an update by Thursday, 2026-08-20 11:45 PDT with details. **Diagnosis / Customer Symptoms** Customers in us-west1 may experience timeouts, service degradations, errors, and elevated latencies across multiple products. **Workaround** No workarounds needed at this time.

    5. 2026年8月20日 18:53 UTCresolved

      **Summary** The issue causing timeouts, degradations, errors, and latencies across multiple us-west1 products has been mitigated and we are working to recover all products. **Description** Mitigation actions have been completed by our engineering teams and we are seeing recovery from multiple products. We are continuing to work to recover the remaining products. We will provide an update by Thursday, 2026-08-20 12:30 PDT with details. **Diagnosis / Customer Symptoms** Customers in us-west1 may experience timeouts, service degradations, errors, and elevated latencies across multiple products. **Workaround** No workarounds needed at this time.

    6. 2026年8月20日 19:21 UTCresolved

      **Summary** The issue causing timeouts, degradations, errors, and latencies across multiple us-west1 products has been mitigated and we are working to recover all products. **Description** Mitigation actions have been completed by our engineering teams and we are seeing recovery from multiple products. We are continuing to work to recover the remaining products. We will provide an update by Thursday, 2026-08-20 13:30 PDT with details. **Diagnosis / Customer Symptoms** Customers in us-west1 may experience timeouts, service degradations, errors, and elevated latencies across multiple products. **Workaround** No workarounds needed at this time.

    7. 2026年8月20日 19:37 UTCresolved

      **Summary** The issue causing timeouts, degradations, errors, and latencies across multiple us-west1 products has been mitigated. **Description** We have mitigated the issue impacting multiple products in our us-west1 region as of Thursday, 2026-08-20 10:22 PDT. Our engineering teams have restored capacity on a planned optical maintenance that caused unexpected congestion in Dalles, Oregon metro /us-west1 region. Our systems stabilized and services have recovered once capacity was restored. Our teams are continuing to monitor for any residual impact. We will publish an analysis of this incident once we have completed our internal investigation. We thank you for your patience while we worked on resolving the issue. **Diagnosis / Customer Symptoms** Customers in us-west1 may have experienced timeouts, service degradations, errors, and elevated latencies across multiple products. **Workaround** This issue is now mitigated.

    8. 2026年8月25日 6:20 UTCresolved

      # Preliminary Incident Report We sincerely apologize for the disruption this incident caused to your business operations. Recognizing your reliance on Google Cloud, we express our sincere regrets for any operational impact experienced. Our engineering teams are actively addressing the underlying root cause to prevent future recurrences. Please note that the information provided herein reflects our current understanding as of the time of publication and remains subject to revision as the investigation progresses. A comprehensive Incident Report detailing preventive measures will be issued upon conclusion of our inquiry. If you have experienced impact outside of what is listed below, please reach out to Google Cloud Support using https://cloud.google.com/support. ## Date/Time of the Issue (All time US/Pacific) * Incident Start: 20 August 2026 08:00 * Incident End: 20 August 2026 10:22 * Duration: 2 hours, 22 minutes ## Summary On Thursday, 20 August 2026, multiple Google Cloud services encountered elevated latency, provisioning failures, increased error rates, and service degradations lasting for a duration of 2 hours and 22 minutes. ## Preliminary Root Cause The disruption originated during scheduled fiber optic maintenance, which unexpectedly compromised network capacity between data centers within the us-west1 region. Automated rerouting mechanisms failed to properly redistribute traffic to alternate capacity, resulting in network congestion as volumes exceeded available bandwidth in the affected area. This underlying network degradation subsequently impacted higher-level service components through request throttling, increased latency, and cascading retries. Consequently, both control plane operations and data plane requests failed to execute successfully across several dependent Google Cloud services, producing the observed latency and elevated error rates. ## Remediation Internal monitoring alerted Google engineers to the incident, confirming that multiple services across us-west1 were affected. To mitigate the immediate operational impact, engineers initiated traffic draining protocols, re-routing service workloads away from the degraded network infrastructure. Following the restoration of inter-campus network capacity and the resolution of the core issue, engineers systematically restored traffic to the us-west1 region and confirmed service normalization. Long-term engineering solutions are currently being finalized and assigned to address the root cause and strengthen system resilience regarding fiber maintenance procedures. ## Description of Impact On Thursday, August 20, between 08:00 and 10:22 US/Pacific, Google Cloud customers in the us-west1 region encountered elevated latency, provisioning failures, and increased error rates. * Proportionate Impact / Error Rates: The precise scope of impact—including the proportion of affected projects and applications—and detailed error metrics will be published in the comprehensive Root Cause Analysis, as the reduced capacity caused request throttling, latency spikes, and increased retry volume. * Scope Exclusion: Services and workloads operating in regions other than us-west1 remained fully operational and unaffected. **Affected Services and Features** The following services experienced elevated latencies and/or increased error rates, across their respective data planes and control planes: * AlloyDB * Apache Kafka * Apigee Edge Public Cloud * Apigee X * Artifact Registry * BigQuery & BigQuery Data Transfer Service * Cloud Build * Cloud Data Fusion * Cloud Dataflow * Cloud Filestore * Cloud Key Management Service (KMS) * Cloud Monitoring * Cloud Run * Cloud SQL * Contact Center AI Platform * Dataproc Metastore * Google App Engine * Google Cloud Bigtable * Google Cloud Pub/Sub * Google Cloud Storage (GCS) * Google Compute Engine (GCE) * Google Kubernetes Engine (GKE) * Identity and Access Management (IAM) * Managed Airflow (Cloud Composer) *Managed Service for Apache Spark (Dataproc) Persistent Disk

    9. 2026年8月27日 21:45 UTCresolved

      # Incident Report ## Summary On Thursday, 20 August 2026, from 08:00 to 10:22 US/Pacific (15:00 to 17:22 UTC), multiple Google Cloud services in the us-west1 region experienced elevated latency, provisioning failures, increased error rates, and widespread service degradations for a total duration of 2 hours and 22 minutes. The incident impacted a wide range of core services — including Persistent Disk, Google Kubernetes Engine, Google Compute Engine, Cloud Run, Google Cloud Bigtable, Cloud Storage, and Identity and Access Management — across both control plane operations and data plane requests. We sincerely apologize for the disruption this incident caused to your business operations and critical workloads. We recognize the vital role Google Cloud plays in supporting your organization, and we deeply regret the impact on your business operations and critical workloads. Engineering and infrastructure teams are actively implementing measures to address the root causes and strengthen network resiliency to prevent recurrences in the future. Specifically, teams are monitoring recovery progress, refining safety checks for planned optical maintenance, and optimizing regional traffic routing mechanisms to safeguard against unexpected capacity constraints. ## Root Cause The disruption originated during scheduled fiber optic maintenance, which unexpectedly compromised network capacity between data centers within the us-west1 region. Automated rerouting mechanisms failed to properly redistribute traffic to alternate capacity, resulting in network congestion as volumes exceeded available bandwidth in the affected area. This underlying network degradation subsequently impacted higher-level service components through severe packet loss, request throttling, and increased latency across inter-campus dependencies. Core infrastructure services, including Spanner Paxos consensus and the Unified Metadata Server (UMS), experienced significant latency spikes, which cascaded into timeouts and elevated error rates for downstream dependent products such as Cloud Storage, Cloud IAM, Persistent Disk, and Google Kubernetes Engine. Consequently, both control plane operations and data plane requests failed to execute successfully across multiple Google Cloud services in us-west1 throughout the duration of the incident. ## Remediation and Prevention Internal monitoring systems initially detected widespread service anomalies and alerted Google engineers, who promptly confirmed that multiple core services operating across the us-west1 region were severely impacted. In response to the immediate operational risks, engineering teams promptly executed emergency traffic draining protocols to reroute active service workloads away from the compromised inter-campus network infrastructure and minimize further customer disruption. Once teams restored inter-campus fiber network capacity, engineers systematically reintroduced production traffic back to us-west1 through controlled validation stages, ultimately confirming full service normalization across all impacted platforms. Longer term engineering remediations and architectural enhancements are actively being finalized and assigned to owning teams. Key focus areas include reforming scheduled maintenance protocols, establishing stricter safety checks and circuit redundancy requirements prior to routine maintenance, and refining automated regional traffic failover mechanisms to automatically handle sudden capacity degradation without incurring severe network congestion. ## Detailed Description of Impact On Thursday, August 20, between 08:00 and 10:22 US/Pacific, Google Cloud customers in the us-west1 region encountered elevated latency, provisioning failures, and increased error rates. * **Impact / Error Rates:** The reduced capacity caused request throttling, latency spikes, and increased retry volume. * **Scope Exclusion:** Services and workloads operating in regions other than us-west1 remained fully operational and unaffected. **Affected Services and Features** The following services experienced elevated latencies and/or increased error rates, across their respective data planes and control planes: * AlloyDB * Apache Kafka * Apigee Edge Public Cloud * Apigee X * Artifact Registry * BigQuery & BigQuery Data Transfer Service * Cloud Build * Cloud Data Fusion * Cloud Dataflow * Cloud Filestore * Cloud Key Management Service (KMS) * Cloud Monitoring * Cloud Run * Cloud SQL * Contact Center AI Platform * Dataproc Metastore * Google App Engine * Google Cloud Bigtable * Google Cloud Pub/Sub * Google Cloud Storage (GCS) * Google Compute Engine (GCE) * Google Kubernetes Engine (GKE) * Identity and Access Management (IAM) * Managed Airflow (Cloud Composer) * Managed Service for Apache Spark (Dataproc) * Persistent Disk The regional incident in us-west1 followed a structured three-phase recovery dictated by platform dependency layers: While core platform connectivity and live request serving were restored by 10:22 US/Pacific, certain services took additional time to fully recover due to asynchronous backlog processing and localized control-plane state reconciliation for a very small set of customers. For event-driven and pipeline services, inbound error rates dropped to 0 immediately, but some operations experienced elevated latency while workers processed through backlogs accumulated during the outage, clearing later for Cloud Pub/Sub, Cloud Build & Deploy, Cloud Dataflow, and Cloud Storage lifecycle deletions. Concurrently, while primary read/write traffic was healthy across the region, specific long-running lifecycle workflows required extra time to clear locks and reconcile distributed state machines. Compute Engine VM provisioning in zone us-west1-c and Cloud Filestore control plane instance allocation locks and resource validation checks took longer to normalize across regional storage backends.

    Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solutions (BMS) services are experiencing a service outage in europe-west4-a due to a cooling failure.

    開始 2026年7月15日 23:57 UTC · 12h 28m

    Outage重大なインシデント
    1. 2026年7月16日 3:30 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services are experiencing temperature alerts in europe-west4-a. **Description** **GCVE:** Our engineering teams are currently working with data center facility teams to address the rising temperatures. A shutdown has already occurred for some private clouds, and we expect that others will shut down as well. **We recommend shutting down your VMware workload VMs for precaution so that recovery is safer. A shutdown of all systems started at 19:00 PDT \[4:00 Local Time (GMT+2)\]** We will notify you as soon as your Private Cloud has been powered back up and it is safe to restart the VMs. **BMS:** Some Bare Metal Solution servers are experiencing high temperatures and we are in the process of shutting them down. Customers may be unable to access their systems until we resolve the issue. **Google Cloud NetApp Volumes** Our engineering team has proactively shut down ONTAP clusters to protect the data stored on them. Customers may experience unavailability of Cloud NetApp Volumes until this issue is resolved. There is no estimated time for resolution. We will provide an update by Wednesday, 2026-07-15 21:30 PDT with current details. We apologize to all who are affected by the disruption. **Customer Symptoms** **GCVE:** Customers may have already observed a loss of connectivity to their private cloud. As a protective measure for hardware integrity and a recovery, we are shutting down all Private Clouds in this zone. **BMS:** Customers may have already lost connectivity to their BMS machines. As a protective measure for hardware integrity and a recovery, we are shutting down servers in this zone. **Google Cloud NetApp Volumes** Customers may have already lost connectivity to ONTAP clusters, or will lose connectivity to them shortly, as we proactively shut them down for their protection. Only Standard, Premium, and Extreme service levels are affected. **Workaround** There are no workarounds available for this issue at this time. Customers with multi-regional deployments are advised to route traffic to an alternate site.

    2. 2026年7月16日 4:17 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services are experiencing temperature alerts in europe-west4-a **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google has proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. The datacenter operator team is working diligently to bring cooling and power back online so we can safely restart affected workloads. **GCVE:** Our engineering teams have shut down private clouds, and we expect that others will shut down as well. We will notify customers as soon as their private cloud has been powered back up and it is safe to restart the VMs. **BMS:** Some Bare Metal Solution servers are experiencing high temperatures and we are in the process of shutting them down. Customers may be unable to access their systems until we resolve the issue. **Google Cloud NetApp Volumes** Our engineering team has proactively shut down ONTAP clusters to protect the data stored on them. Customers may experience unavailability of Cloud NetApp Volumes until this issue is resolved. There is no estimated time for resolution. We will provide an update by Wednesday, 2026-07-15 22:30 PDT with current details. We apologize to all who are affected by the disruption. **Customer Symptoms** **GCVE:** Customers would have already observed a loss of connectivity to their private cloud. As a protective measure for hardware integrity and a recovery, we have shut down all private clouds in this zone. **BMS:** Customers may have already lost connectivity to their BMS machines. As a protective measure for hardware integrity and a recovery, we are shutting down some servers in this zone. **Google Cloud NetApp Volumes** Customers would have already lost connectivity to ONTAP clusters, as we proactively shut them down for their protection. Only Standard, Premium, and Extreme service levels are affected. **Workaround** There are no workarounds available for this issue at this time. Customers with multi-regional deployments are advised to route traffic to an alternate site.

    3. 2026年7月16日 4:41 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services are experiencing a service outage in europe-west4-a due to a cooling failure **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google has proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. The datacenter operator team is working diligently to bring cooling and power back online so we can safely restart affected workloads. Some cooling has been restored, and we are working to restore affected workloads as available capacity allows. **GCVE:** Cooling has been restored at the site. As a precautionary measure, our engineering teams had shut down private clouds to protect these clouds from any damage. We are beginning service restoration and will notify customers as soon as their private cloud has been powered back up and it is safe to restart the VMs. **BMS:** Some Bare Metal Solution servers experienced high temperatures and we proactively shut them down. We are starting to bring the servers back online, and will provide an update once they are ready. Customers may be unable to access these systems until service is restored. **Google Cloud NetApp Volumes:** Our engineering team has proactively shut down ONTAP clusters to protect the data stored on them. Customers may experience unavailability of Cloud NetApp Volumes until this issue is resolved. There is no estimated time for resolution. We will provide an update by Wednesday, 2026-07-15 23:30 PDT with current details. We apologize to all who are affected by the disruption. **Customer Symptoms** **GCVE:** Customers would have already observed a loss of connectivity to their private cloud. As a protective measure for hardware integrity and recovery, we have shut down all private clouds in this zone. **BMS:** Customers may have lost connectivity to their BMS machines. As a protective measure for hardware integrity and recovery, we shut down some servers in this zone, and are actively restoring them. Customers may be unable to access these systems until restoration is complete. **Google Cloud NetApp Volumes:** Customers would have already lost connectivity to ONTAP clusters, as we proactively shut them down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels are affected. **Workaround** There are no workarounds available for this issue at this time. However, customers with multi-regional deployments are advised to route traffic to an alternate site.

    4. 2026年7月16日 6:29 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services are experiencing a service outage in europe-west4-a due to a cooling failure. **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. Cooling and power have been restored at the site. The datacenter operator team is now working to safely restart affected workloads. **GCVE:** As a precautionary measure, our engineering teams had shut down private clouds to protect these clouds from any damage. Service restoration is still in progress. We will notify customers as soon as their private cloud has been powered back up and it is safe to restart the VMs. **BMS:** We are continuing to restore servers and monitor their health. Customers may be unable to access these systems until service restoration is complete. **Google Cloud NetApp Volumes:** Our engineering team had proactively shut down ONTAP clusters to protect the data stored on them. Customers may experience unavailability of Cloud NetApp Volumes until this issue is resolved. We will provide an update by Thursday, 2026-07-16 00:30 PDT with current details. **Customer Symptoms** **GCVE:** Customers would have already observed a loss of connectivity to their private cloud. As a protective measure for hardware integrity and recovery, we have shut down all private clouds in this zone. **BMS:** Customers may have lost connectivity to their servers. As a protective measure for hardware integrity and recovery, we shut down some servers in this zone. We are continuing to restore servers and monitor their health. Customers may be unable to access these systems until service restoration is complete. **Google Cloud NetApp Volumes:** Customers would have already lost connectivity to ONTAP clusters, as we proactively shut them down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels are affected. **Workaround** There are no workarounds available for this issue at this time. However, customers with multi-regional deployments are advised to route traffic to an alternate site.

    5. 2026年7月16日 7:39 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services are experiencing a service outage in europe-west4-a due to a cooling failure. **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. Cooling and power have been restored at the site. The datacenter operator team is now working to safely restart affected workloads. **GCVE:** As a precautionary measure, our engineering teams had shut down private clouds to protect these clouds from any damage. Network fabric has been restored, and Private Cloud restoration remains underway. We will notify affected customers once their Private Clouds are restored to allow for VM operational verification. **BMS:** We are continuing to restore servers and monitor their health. Customers may be unable to access these systems until service restoration is complete. **Google Cloud NetApp Volumes:** Our engineering team had proactively shut down ONTAP clusters to protect the data stored on them. Recovery is currently in progress. Customers may experience unavailability of Cloud NetApp Volumes until this issue is resolved. We will provide an update by Thursday, 2026-07-16 01:30 PDT with current details. **Customer Symptoms** **GCVE:** Customers would have already observed a loss of connectivity to their private cloud. As a protective measure for hardware integrity and recovery, we have shut down all private clouds in this zone. **BMS:** Customers may have lost connectivity to their servers. As a protective measure for hardware integrity and recovery, we shut down some servers in this zone. We are continuing to restore servers and monitor their health. Customers may be unable to access these systems until service restoration is complete. **Google Cloud NetApp Volumes:** Customers would have already lost connectivity to ONTAP clusters, as we proactively shut them down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels are affected. **Workaround** There are no workarounds available for this issue at this time. However, customers with multi-regional deployments are advised to route traffic to an alternate site.

    6. 2026年7月16日 8:32 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services experienced a service outage in europe-west4-a due to a cooling failure. **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. Cooling and power have been restored at the site. The datacenter operator team is now validating site stability. **GCVE:** Network fabric has been restored, and Private Cloud restoration remains underway. We are notifying the affected customers as their Private Clouds are restored to allow for VM operational verification. **BMS:** Server restoration is largely complete, with most systems now online and reporting a healthy status. We are actively working through the remaining validation efforts to achieve full recovery. **Google Cloud NetApp Volumes:** Service restoration is complete, and all affected servers are now operational. We continue to monitor these for full service recovery. If customers are still experiencing impact from this issue, please contact Support, and we will work with you to resolve any residual impact. We will provide an update by Thursday, 2026-07-16 02:30 PDT with current details. **Customer Symptoms** **GCVE:** Customers would have observed a loss of connectivity to their private cloud. As a protective measure for hardware integrity and recovery, we had shut down all Private Clouds in this zone. We are in the process of bringing all restored Private Clouds online. **BMS:** Customers may have lost connectivity to their servers. As a protective measure for hardware integrity and recovery, we had shut down some servers in this zone. We are continuing to restore servers and monitor their health. **Google Cloud NetApp Volumes:** Customers would have lost connectivity to ONTAP clusters, as they were proactively shut down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels were affected. Customers should now be able to access their volumes again. **Workaround** There are no workarounds available for this issue at this time. However, customers with multi-regional deployments are advised to route traffic to an alternate site.

    7. 2026年7月16日 9:21 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services experienced a service outage in europe-west4-a due to a cooling failure. **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. Cooling and power have been restored at the site. The datacenter operator team is now validating site stability. **GCVE:** Network fabric has been restored, and Private Cloud restoration remains underway. We are notifying the affected customers as their Private Clouds are restored to allow for VM operational verification. **BMS:** Server restoration is largely complete, with most systems now online and reporting a healthy status. We are actively working through the remaining validation efforts to achieve full recovery. **Google Cloud NetApp Volumes:** Service restoration is complete, and all affected servers are now operational. We continue to monitor these for full service recovery. If customers are still experiencing impact from this issue, please contact Support, and we will work with you to resolve any residual impact. We will provide an update by Thursday, 2026-07-16 03:30 PDT with current details. **Customer Symptoms** **GCVE:** Customers would have observed a loss of connectivity to their private cloud. As a protective measure for hardware integrity and recovery, we had shut down all Private Clouds in this zone. We are in the process of bringing all restored Private Clouds online. **BMS:** Customers may have lost connectivity to their servers. As a protective measure for hardware integrity and recovery, we had shut down some servers in this zone. We are continuing to restore servers and monitor their health. **Google Cloud NetApp Volumes:** Customers would have lost connectivity to ONTAP clusters, as they were proactively shut down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels were affected. Customers should now be able to access their volumes again. **Workaround** None at this time.

    8. 2026年7月16日 10:14 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services experienced a service outage in europe-west4-a due to a cooling failure. **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. Cooling and power have been restored at the site. The issue with GCVE and Google Cloud NetApp Volumes has been resolved for all affected users. We continue to recover the impact for BMS at the moment. **GCVE [Mitigated]:** Service restoration is complete across all the Private Clouds. Customers have been informed about this restoration and requested to verify that their VMs are fully operational. **Google Cloud NetApp Volumes [Mitigated]:** Service restoration is complete, and all affected servers are now operational. We continue to monitor these for full service recovery. **BMS:** Server restoration is largely complete, with most systems now online and reporting a healthy status. We are actively working through the remaining validation efforts to achieve full recovery. For Google Cloud NetApp Volumes and GCVE, if customers are still experiencing impact from this issue, please contact Support, and we will work with you to resolve any residual impact. We will provide the BMS restoration status update by Thursday, 2026-07-16 04:30 PDT with current details. **Customer Symptoms** The issue is now resolved for GCVE and Google Cloud NetApp Volumes. We continue to recover the impact for BMS at the moment. **GCVE [Mitigated]:** Customers would have observed a loss of connectivity to their private cloud. **Google Cloud NetApp Volumes [Mitigated]:** Customers would have lost connectivity to ONTAP clusters, as they were proactively shut down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels were affected. Customers should now be able to access their volumes again. **BMS:** Customers may have lost connectivity to their servers. As a protective measure for hardware integrity and recovery, we had shut down some servers in this zone. We are continuing to restore servers and monitor their health. **Workaround** None at this time.

    9. 2026年7月16日 11:39 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services experienced a service outage in europe-west4-a due to a cooling failure. **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. Cooling and power have been restored at the site. The issue with GCVE and Google Cloud NetApp Volumes has been resolved for all affected users. We continue to recover the impact for BMS at the moment. **GCVE [Mitigated]:** Service restoration is complete across all the Private Clouds. Customers have been informed about this restoration and requested to verify that their VMs are fully operational. **Google Cloud NetApp Volumes [Mitigated]:** Service restoration is complete, and all affected servers are now operational. We continue to monitor these for full service recovery. **BMS:** Server restoration is largely complete, with most systems now online and reporting a healthy status. We are actively working through the remaining validation efforts to achieve full recovery. For Google Cloud NetApp Volumes and GCVE, if customers are still experiencing impact from this issue, please contact Support, and we will work with you to resolve any residual impact. We will provide the BMS restoration status update by Thursday, 2026-07-16 05:30 PDT with current details. **Customer Symptoms** The issue is now resolved for GCVE and Google Cloud NetApp Volumes. We continue to recover the impact for BMS at the moment. **GCVE [Mitigated]:** Customers would have observed a loss of connectivity to their private cloud. **Google Cloud NetApp Volumes [Mitigated]:** Customers would have lost connectivity to ONTAP clusters, as they were proactively shut down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels were affected. Customers should now be able to access their volumes again. **BMS:** Customers may have lost connectivity to their servers. As a protective measure for hardware integrity and recovery, we had shut down some servers in this zone. We are continuing to restore servers and monitor their health. **Workaround** None at this time.

    10. 2026年7月16日 12:25 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE), Google Cloud NetApp Volumes, and Bare Metal Solution (BMS) services experienced a service outage in europe-west4-a due to a cooling failure. **Description** The datacenter serving europe-west4-a for GCVE, BMS, and NetApp has experienced a power failure, which subsequently caused a cooling failure. Google proactively turned down workloads in order to protect customer data from any risks posed by running infrastructure in a high temperature environment. Cooling and power have been restored at the site. The issue with GCVE and Google Cloud NetApp Volumes has been resolved for all affected users as of Thursday, 2026-07-16 02:31 PDT and 01:00 PDT respectively. The issue with BMS is largely resolved and is believed to be affecting a very small number of customers. Our Engineering will continue to recover this residual impact directly with the impacted customers. If you have questions or are still impacted, please open a case with the Support Team and we will work with you until this issue is resolved. **GCVE:** Service restoration is complete across all the Private Clouds. Customers have been informed about this restoration and requested to verify that their VMs are fully operational. **Google Cloud NetApp Volumes:** Service restoration is complete, and all affected servers are now operational. **BMS:** Service restoration is largely complete. We continue working with a very small number of remaining affected customers to achieve full recovery. We thank you for your patience while we continue to fully resolve the issue. **Customer Symptoms** The issue is now resolved for GCVE and Google Cloud NetApp Volumes. The issue with BMS is largely resolved and our engineering will continue to recover this residual impact directly with the impacted customers. **GCVE:** Customers would have observed a loss of connectivity to their private cloud. **Google Cloud NetApp Volumes:** Customers would have lost connectivity to ONTAP clusters, as they were proactively shut down to protect these clusters from any damage. Only Standard, Premium, and Extreme service levels were affected. **BMS:** Customers may have lost connectivity to their servers. As a protective measure for hardware integrity and recovery, we had shut down some servers in this zone. **Workaround** None at this time.

    11. 2026年7月18日 0:22 UTCresolved

      # Preliminary Incident Report We sincerely apologize for the disruption this incident caused to your business. We know how much you rely on Google Cloud, and we regret the impact on your productivity. Please note, this information is based on our best knowledge at the time of posting and is subject to change as our investigation continues. A final Incident Report with preventative actions will be posted once our investigation is complete. If you have experienced impact outside of what is listed below, please reach out to Google Cloud Support using https://cloud.google.com/support. ## Date/Time of the Issue (All time US/Pacific) **Google Cloud VMware Engine Impact:** - Start: 15 July 2026 17:09 - End: 16 July 2026 2:33 - Duration: 9 Hours, 24 Minutes **Google Cloud NetApp Volumes Impact:** - Start: 15 July 2026 16:39 - End: 16 July 2026 01:10 - Duration: 8 Hours 31 Minutes **Bare Metal Solution Impact:** - Start: 15 July 2026 18:37 - End: 16 July 2026 07:34 - Duration: 12 Hours 57 Minutes ## Summary On Wednesday, 15 July 2026, Google Cloud VMware Engine, Bare Metal Solution, and Google Cloud NetApp Volumes experienced service interruptions for a total duration of 14 hours, 55 minutes. We are taking immediate steps to ensure this doesn’t happen again. ## Preliminary Root Cause A regional data center hosting services in europe-west4-a experienced a loss of utility power and subsequent cooling capacity. The sequence of events leading to customer impact was as follows: - An electrical fault occurred on the utility grid upstream of the data center, disrupting the electrical distribution gear and cooling equipment. - The loss of cooling infrastructure resulted in ambient temperatures rising rapidly within the affected data halls. Host servers, storage clusters, and network switches were shut down to prevent equipment damages due to the extreme heat. - The high temperatures in the data hall resulted in disruption to customer workloads and control plane operations across the affected services. Google engineers have begun a full root cause analysis and we will provide additional information once it is available. ## Remediation Google engineering teams were alerted to the issue via automated temperature and hardware unreachability telemetry starting at 16:39 US/Pacific. Engineers collaborated with the third-party facility provider to safely restore primary utility power and cooling systems, returning ambient room temperatures to safe operational levels. With the environment stabilized, field support engineers and remote teams systematically booted and verified the server hosts, storage nodes, and network fabric in a controlled sequence. Automated recovery playbooks were executed to restore underlying network switches and routing infrastructure, allowing storage appliances and compute clusters to be brought back online and verified for health. The underlying infrastructure has been fully recovered, and normal operations have been successfully restored. ## Description of Impact On 15 July 2026 from 16:39 to 16 July 2026 07:34 US/Pacific, customers experienced service disruptions across several products in europe-west4-a zone: - **Google Cloud VMware Engine:** Customers lost connectivity to their private clouds and workloads as foundational hosts and network switches were powered off for thermal protection. - **Bare Metal Solution:** Customers experienced connectivity loss to their database servers and storage appliances as the underlying hardware was powered down. - **Google Cloud NetApp Volumes:** Customers in the STANDARD, PREMIUM, and EXTREME service levels were unable to access their storage volumes. Control plane operations, including the creation of new storage pools, volumes, and backups, experienced failures in the affected region.

    12. 2026年7月25日 13:16 UTCresolved

      ## \# Incident Report ## \#\# Summary On Wednesday, 15 July 2026, Google Cloud VMware Engine (GCVE), Bare Metal Solution (BMS), and Google Cloud NetApp Volumes (GCNV) experienced service interruptions for a total duration of 14 hours, 55 minutes. The root cause for this outage is a 3ms voltage drop in the power feed from the utility provider and subsequent utility breaker protective action. This incident was mitigated by the data center provider rectifying the failed systems followed by the Google engineering team restoring the services. ## \#\# Root Cause A regional data center hosting services in europe-west4-a experienced an upstream voltage transient affecting both utility power feeds A and B. During this event, the utility breakers on both A and B feeds tripped and initiated the transfer to the back-up power source DRUPS (Diesel Rotary Uninterruptible Power Supply). The transition of side B to DRUPS system was successful without any power interruption. The DRUPS back-up power system for side A failed to take over the facility load due to electrical component failures. The DRUPS failure to take over load initiated automatic transfer of the affected 3 rows from feed A to redundant power feed B. Rows 1 and 2 transferred to power feed B successfully. Row 3 failed to transfer to power feed B and experienced complete power loss due to an overload protection breaker trip. The root cause of the failed transfer on the affected row was identified as load deployment discrepancy which is under further investigation by Google engineering team. This resulted in loss of both redundant power feeds to the single row. During the voltage transient event, the server data hall experienced an increased temperature due to a cooling system failure. The chiller controller dropped offline during the voltage transient event, failing to signal the chilled water distribution pumps to restart and ultimately causing the chiller system A to shut down. The redundant source was not available due to known ongoing construction work at the facility. This resulted in the data hall temperatures reaching 44°C and subsequent shutdown of the affected data hall machines. Google engineering teams initiated machine shutdown procedures for the remainder of reachable devices as part of the cooling emergency shutdown process. A timeline of events during the incident is provided below. ### DataCenter Events | Timestamp(PST) | Event Description | | :---- | :---- | | 07-15-2026 16:24 | An electrical fault occurred on the utility grid upstream of the data center, disrupting the electrical distribution. | | 07-15-2026 16:24 | DRUPS back-up power system for side A failed to take over the data hall load. | | 07-15-2026 16:24 | The chiller controller dropped offline during the voltage transient event causing distribution pumps to stop and unable to restart. | | 07-15-2026 16:37 | Rows 1 and 2 transferred to power feed B successfully. Row 3 failed to transfer to power feed B and lost power. | | 07-15-2026 18:29 | Data hall temperatures reached 44C and crossed the safe machine operating threshold. | | 07-15-2026 19:55 | Machine shutdown procedures implemented. | | 07-15-2026 21:05 | Cooling system fully recovered and temperatures in the data hall returned to normal operating range. | | 07-15-2026 21:24 | Notification about cooling recovery sent by provider | | 07-15-2026 21:46 | Notification about power recovery sent by provider | ### GCVE Timelines | Timestamp(PST) | Event Description | | :---- | :---- | | 07-15-2026 16:30 | GCVE service power monitoring alert received | | 07-15-2026 16:41 | First symptom detected, servers reporting redundancy power feed failure. | | 07-15-2026 17:05 | Switch temperature \>60°C alerts triggered. | | 07-15-2026 17:09 | Start of user impact, first prober alert failure for north south traffic for customers. | | 07-15-2026 19:00 | Server / Network devices shutdown initiated. | | 07-15-2026 19:55 | All reachable server/network devices were shut down. | | 07-15-2026 21:24 | Cooling system fully recovered and temperatures in the datahall were returning to normal operating range. | | 07-15-2026 21:56 | Network restoration started with reachable hydra devices. | | 07-15-2026 22:40 | Onsite technician arrived, to recover the console servers. | | 07-15-2026 23:10 | Console server reboot/recovery complete. | | 07-16-2026 00:33 | Network recovery for all Placement Groups complete. | | 07-16-2026 02:36 | Incident mitigated, after recovering all the customer PCs are fully healthy. | This outage impacted 24 private clouds of 20 distinct customers in europe-west4-a region. ### Bare Metal Solutions (BMS) Timelines | Timestamp(PST) | Event Description | | :---- | :---- | | 07-15-2026 16:41 | First symptom detected, servers and storage reporting redundancy power feed failure | | 07-15-2026 17:52 | Automated monitoring detected rising temperatures | | 07-15-2026 18:37 | Four Netapp SAN storage nodes failed and were shut down due to overheating, resulting in storage availability issue | | 07-15-2026 18:37 | Customer impact started, first server shutdown detected | | 07-15-2026 18:59 | Reserve and buffer servers started to get powered off | | 07-15-2026 20:43 | Drop in the temperature has been detected | | 07-15-2026 20:52 | Four Netapp SAN storage nodes recovered, mitigating storage availability issue | | 07-15-2026 21:05 | The cooling system fully recovered and temperatures in the datahall were returning to normal operating range. | | 07-15-2026 23:23 | First customer server reboot started | | 07-16-2026 06:32 | Last customer server reboot started | | 07-16-2026 08:42 | Incident mitigated. All impacted customer servers were rebooted and confirmed in healthy state. | This outage impacted 9 distinct BMS customers in europe-west4 ### NetApp Timelines | Timestamp(PST) | Event Description | | :---- | :---- | | 07-15-2026 16:32 | Netapp facility remote monitoring alert on high temp and network switches switches failure received | | 07-15-2026 17:32 | All 6 clusters failed and were shut down automatically due to high temperature | | 07-15-2026 21:05 | Cooling capacity restored | | 07-15-2026 22:08 | Cluster recovery process initiated for all 6 clusters. 1st cluster recovered | | 07-15-2026 23:55 | All 6 Netapp Clusters and all customers recovered and validated as healthy & operational | ## \#\# Remediation and Prevention Google engineers were alerted to the infrastructure power loss on Wednesday, 15 July 2026 at 16:30 US/Pacific and subsequent increase in data hall temperatures at 17:44 US/Pacific via our automated monitoring and telemetry, and immediately began investigating. During the voltage transient event, the chillers maintained power but shut down because the distribution pumps failed to restart, resulting in no water flow. The pumps were manually switched from auto to hand mode to restore circulation and cooling. The facility team deployed an interim portable UPS to support the chiller controllers and prevent localized controller power loss. Upon confirmation of utility power restoration, the facility returned to utility power via automatic switching with the exception of two Remote Power Panels (RPPs), which required manual verification before restoration of power to affected server row. To provide full resiliency the facility team aligned a swing DRUPS unit to restore the redundant configuration on the A feed and is working on repairing the faulty DRUPS. To remediate the power loss at Row 3, once the electrical fault was confirmed to be fully isolated, teams reset the tripped breakers, successfully restoring both redundant power to the impacted server racks. Google is committed to preventing a repeat of this issue in the future and is completing the following actions: * Detailed investigation by the engineering team of the sequence of events that prevented transfer of load to DRUPS system and identified system improvements **\[ETA Aug 2026\].** * Determine and resolve the cause of overload conditions that caused power loss to Row 3 **\[ETA Aug 2026\].** * Perform investigation of chiller pump control system redundancy setup to ensure cooling system resiliency **\[ETA Sep 2026\].** * Implement improvements to facility system monitoring alerts for power events and configure early alert thresholds for cooling excursion detection. **\[ETA Aug 2026\].** * The GCVE engineering team is working to improve the automated triggering of shutdown during quickly evolving thermal runoff situations **\[ETA Oct 2026\]**. * The BMS engineering team is working with partner teams to update the incident classification and SLO definitions to improve personnel availability during major datacenter events **\[ETA Sep 2026\]**. * The GCNV engineering team is collaborate with the data center team to review incident handling SLA and runbooks, identify potential future occurrences and create playbooks to address/mitigate them, establish monthly joint emergency drill, and review if the Netapp cluster recovery process can be expedited **\[ETA Aug 2026\].** ## \#\# Detailed Description of Impact On 15 July 2026 from 16:39 to 16 July 2026 07:34 US/Pacific, customers experienced service disruptions across several products in europe-west4-a zone: * **Google Cloud VMware Engine**: Customers lost connectivity to their private clouds and workloads as foundational hosts and network switches were powered off for thermal protection. * **Bare Metal Solution**: Customers experienced connectivity loss to their database servers and storage appliances as the underlying hardware was powered down. * **Google Cloud NetApp Volumes**: Customers in the STANDARD, PREMIUM, and EXTREME service levels were unable to access their storage volumes. Control plane operations, including the creation of new storage pools, volumes, and backups, experienced failures in the affected region.

    Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions.

    開始 2026年7月14日 17:00 UTC · 10h 40m

    Outage重大なインシデント
    1. 2026年7月14日 20:24 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an issue with Google Cloud VMware Engine (GCVE) beginning Tuesday, 2026-07-14 at 10:00 PDT. We are continuing to investigate and mitigate the issue. We believe this disruption is isolated to network connectivity issues for stretch clusters, while Storage and Compute services appear to be unaffected. GCVE VMs are running as expected but customers may experience connectivity issues to the VMs. We will provide another update by Tuesday, 2026-07-14 14:00 PDT with current details. **Customer Symptoms** Some GCVE customers may experience inter-site communication failures to their GCVE environments within the affected zones. **Workaround** None at this time.

    2. 2026年7月14日 21:31 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an inter-site communication issue with Google Cloud VMware Engine (GCVE) stretched cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We have identified the customers that are affected by this issue and we are working with them on mitigation. Our preliminary investigation indicates this is stemming from an underlying network connectivity issue affecting the infrastructure that links the zones within a stretch cluster. This disruption is causing synchronization issues between the affected zones. We believe Storage and Compute services remain unaffected, and VMs are running as expected, though connectivity to them may be degraded. We will provide another update by Tuesday, 2026-07-14 15:00 PDT with current details. **Customer Symptoms** Some GCVE customers using Stretched Cluster may experience inter-site communication failures to their GCVE environments within the affected zones. **Workaround** While we work on restoring full connectivity, we recommend the following workarounds to restore access to your workloads: - VM Migration (recommended): Where possible, migrate your affected VMs to the healthy and unaffected side of the stretch cluster. We strongly recommend consulting with Google Support before proceeding.

    3. 2026年7月14日 22:16 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an inter-site communication issue with Google Cloud VMware Engine (GCVE) stretched cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We have identified the customers that are affected by this issue and we are working with them on mitigation. Our investigation has identified underlying inter-zone communication failures and Border Gateway Protocol (BGP) session flapping between cluster zones. Specifically, network connectivity has been lost between the affected zones and the witness appliance. Because the witness appliance is currently unreachable, the cluster zones are unable to safely synchronize state. As a result, VMs on the affected sites are becoming isolated and may be left without writable data. **Failover / VM Migration:** Migrating affected VMs to the healthy, secondary zone of your stretch cluster remains the primary mitigation strategy. Because of the complexities surrounding failover risks and secondary zone health, we highly encourage you to open a ticket with Google Cloud Support if you are severely impacted. We do not currently have an ETA for resolution. We will provide another update by Tuesday, 2026-07-14 16:00 PDT with current details. **Customer Symptoms** Some GCVE customers using Stretched Cluster may experience inter-site communication failures to their GCVE environments within the affected zones. **Workaround** While we work on restoring full connectivity, we recommend the following workarounds to restore access to your workloads: - VM Migration (recommended): Where possible, migrate your affected VMs to the healthy and unaffected side of the stretch cluster. We strongly recommend consulting with Google Support before proceeding.

    4. 2026年7月14日 23:05 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an inter-site communication issue with Google Cloud VMware Engine (GCVE) stretched cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We have identified the customers that are affected by this issue and we are working with them on mitigation. Our investigation has identified a recent configuration update that is the likely cause of the inter-zone network disruption. Teams are working on remediation. **Failover / VM Migration:** Migrating affected VMs to the healthy, secondary zone of your stretch cluster remains the primary mitigation strategy. Because of the complexities surrounding failover risks and secondary zone health, we highly encourage you to open a ticket with Google Cloud Support if you are severely impacted. We do not currently have an ETA for resolution. We will provide another update by Tuesday, 2026-07-14 17:00 PDT with current details. **Customer Symptoms** Some GCVE customers using Stretched Cluster may experience inter-site communication failures to their GCVE environments within the affected zones. **Workaround** While we work on restoring full connectivity, we recommend the following workarounds to restore access to your workloads: - VM Migration (recommended): Where possible, migrate your affected VMs to the healthy and unaffected side of the stretch cluster. We strongly recommend consulting with Google Support before proceeding.

    5. 2026年7月15日 0:13 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an inter-site communication issue with Google Cloud VMware Engine (GCVE) stretched cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We have identified the customers that are affected by this issue and we are working with them on mitigation. A remediation rollout is currently in progress to address the underlying network issue. **Failover / VM Migration:** Migrating affected VMs to the healthy, secondary zone of your stretch cluster remains the primary mitigation strategy. Because of the complexities surrounding failover risks and secondary zone health, we highly encourage you to open a ticket with Google Cloud Support if you are severely impacted. We do not currently have an ETA for resolution. We will provide another update by Tuesday, 2026-07-14 18:00 PDT with current details. **Customer Symptoms** Some GCVE customers using Stretched Cluster may experience inter-site communication failures to their GCVE environments within the affected zones. Upon further investigation we identified that the northamerica-northeast2 region was not impacted. **Workaround** While we work on restoring full connectivity, we recommend the following workarounds to restore access to your workloads: - VM Migration (recommended): Where possible, migrate your affected VMs to the healthy and unaffected side of the stretch cluster. We strongly recommend consulting with Google Support before proceeding.

    6. 2026年7月15日 1:15 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an inter-site communication issue with Google Cloud VMware Engine (GCVE) stretched cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We have identified the customers that are affected by this issue and we are working with them on mitigation. A remediation rollout is currently in progress to address the underlying network issue. **Failover / VM Migration:** Migrating affected VMs to the healthy, secondary zone of your stretch cluster remains the primary mitigation strategy. Because of the complexities surrounding failover risks and secondary zone health, we highly encourage you to open a ticket with Google Cloud Support if you are severely impacted. We do not currently have an ETA for resolution. We will provide another update by Tuesday, 2026-07-14 19:00 PDT with current details. **Customer Symptoms** Some GCVE customers using Stretched Cluster may experience inter-site communication failures to their GCVE environments within the affected zones. **Workaround** While we work on restoring full connectivity, we recommend the following workarounds to restore access to your workloads: - VM Migration (recommended): Where possible, migrate your affected VMs to the healthy and unaffected side of the stretch cluster. We strongly recommend consulting with Google Support before proceeding.

    7. 2026年7月15日 1:55 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an inter-site communication issue with Google Cloud VMware Engine (GCVE) stretched cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We have identified the customers that are affected by this issue and we are working with them on mitigation. A remediation rollout is currently in progress to address the underlying network issue. **Failover / VM Migration:** Migrating affected VMs to the healthy, secondary zone of your stretch cluster remains the primary mitigation strategy. Because of the complexities surrounding failover risks and secondary zone health, we highly encourage you to open a ticket with Google Cloud Support if you are severely impacted. We do not currently have an ETA for resolution. We will provide another update by Tuesday, 2026-07-14 20:30 PDT with current details. **Customer Symptoms** Some GCVE customers using Stretched Cluster may experience inter-site communication failures to their GCVE environments within the affected zones. **Workaround** While we work on restoring full connectivity, we recommend the following workarounds to restore access to your workloads: - VM Migration (recommended): Where possible, migrate your affected VMs to the healthy and unaffected side of the stretch cluster. We strongly recommend consulting with Google Support before proceeding.

    8. 2026年7月15日 3:27 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers are experiencing zonal outages impacting network connectivity across multiple regions. **Description** We are experiencing an inter-site communication issue with Google Cloud VMware Engine (GCVE) stretched cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We have identified the customers that are affected by this issue and we are working with them on mitigation. A remediation rollout is currently in progress to address the underlying network issue. **Failover / VM Migration:** Migrating affected VMs to the healthy, secondary zone of your stretch cluster remains the primary mitigation strategy. Because of the complexities surrounding failover risks and secondary zone health, we highly encourage you to open a ticket with Google Cloud Support if you are severely impacted. We do not currently have an ETA for resolution. We will provide another update by Tuesday, 2026-07-14 22:00 PDT with current details. **Customer Symptoms** Some GCVE customers using Stretched Cluster may experience inter-site communication failures to their GCVE environments within the affected zones. **Workaround** While we work on restoring full connectivity, we recommend the following to restore access to your workloads: * VM Migration (recommended): Where possible, migrate your affected VMs to the healthy and unaffected side of the stretch cluster. We strongly recommend consulting with Google Cloud Support before proceeding.

    9. 2026年7月15日 5:34 UTCresolved

      **Summary** Google Cloud VMware Engine (GCVE) Stretched Cluster customers may have experienced zonal outages impacting network connectivity across multiple regions. **Description** We experienced an inter-site communication issue with Google Cloud VMware Engine (GCVE) Stretched Cluster customers beginning Tuesday, 2026-07-14 at 10:00 PDT. We identified the affected customers, and have worked with them to fully mitigate the issue by Tuesday, 2026-07-14 at 21:46 PDT. Preliminary analysis indicates that a network configuration update was the cause of the inter-zone network disruption. Our engineering team mitigated the issue by rolling back the faulty configuration to its last-known good value. If customers are still experiencing impact from this issue, please contact Support, and we will work with you to resolve any residual impact. We thank you for your patience while we worked to resolve this issue. **Customer Symptoms** Some GCVE customers using Stretched Cluster may have experienced inter-site communication failures to their GCVE environments within the affected zones. **Workaround** The issue is now mitigated.

    10. 2026年7月20日 18:31 UTCresolved

      ## Preliminary Incident Report We sincerely apologize for the disruption this incident caused to your business. We know how much you rely on Google Cloud, and we regret the impact on your productivity. We are working to address the root cause and prevent this from occurring in the future. Please note, this information is based on our best knowledge at the time of posting and is subject to change as our investigation continues. A final Incident Report with preventative actions will be posted once our investigation is complete. If you have experienced impact outside of what is listed below, please reach out to Google Cloud Support using [**https://cloud.google.com/support**](https://cloud.google.com/support). ## Date/Time of the Issue (All time US/Pacific) Incident Start: 14 July 2026 10:00 Incident End: 14 July 2026 20:40 Duration: 10 hours, 40 minutes ## Summary On Tuesday, 14 July 2026, Google Cloud VMware Engine (GCVE) Stretched Cluster customers in the australia-southeast2 and europe-west3 zones experienced inter-site communication failures. The disruption was traced to a network configuration update that introduced a conflict, causing inter-site communication failures, which triggered VMware Stretch Cluster failover events. Google engineers successfully mitigated the disruption by rolling back the configuration change. ## Preliminary Root Cause A configuration change deployed within the Google Cloud network affected traffic between the VMware Engine stretched cluster zones. This resulted in a loss of connectivity between zones in the stretched cluster deployment. Google engineers are doing a full root cause analysis and will provide additional information once it is available. ## Remediation To stabilize the environment, engineers identified the working network paths and deployed configuration changes to reroute traffic and restore connectivity. GCVE stretch cluster inter-zonal connectivity was completely restored for all supported locations on Tuesday, 14 July 2026 at 20:40 US/Pacific. ## Description of Impact On Tuesday, 14 July 2026 from 10:00 to 20:40 US/Pacific, customers utilizing GCVE stretch clusters in the affected zones (australia-southeast2, and europe-west3) experienced inter-site communication failures. For some customers, depending on their architecture, this disruption led to VMWare HA event causing VM restarts/movement across zones as designed, Host disconnects, VSAN alarms and Intermittent access to VMware Management (vCenter/NSX Manager) components. ---

    11. 2026年7月24日 7:10 UTCresolved

      ## Incident Report ## Summary On Tuesday, 14 July 2026 10:00 PT, Google Cloud VMware Engine (GCVE) Stretched Cluster customers in the australia-southeast2 and europe-west3 zones experienced inter-site communication failures. The disruption was traced to a network configuration update that introduced a conflict, causing inter-site communication failures, which triggered VMware Stretched Cluster failover events. Google engineers successfully mitigated the impact by rolling back the issue-causing configuration change and resetting the network state. We sincerely apologize for the disruption this incident caused to your business. We know how much you rely on Google Cloud, and we regret the impact on your productivity. We are working to address the root cause and prevent this from occurring in the future. ## Root Cause A network configuration update intended to prepare the cloud network infrastructure for new capabilities was deployed to the foundational network control plane. While the configuration payload itself was structurally valid, it exposed an implementation gap within the control plane's routing logic. This logical gap caused the underlying network hosts to misconfigure program routing tables. As a result, traffic destined for the private IP address space used by GCVE Stretched Clusters was dropped. Because Stretched Clusters rely on this private address space to establish routing sessions for inter-zonal connectivity, the traffic drops severed communications between the active zones of the clusters, triggering VMware High Availability (HA) failovers. Standard routing health-checking protocols, such as Border Gateway Protocol (BGP) and Bidirectional Forwarding Detection (BFD), remained fully functional because their control plane sessions run on separate, unaffected address spaces. Because the control plane remained healthy, standard failover mechanisms failed to detect that the selective private IP range used for inter-zonal data tunneling was being dropped. Automated safeguards did not block the deployment because the configuration passed initial payload validations. The impact only manifested once the update began routing data traffic through the specific affected IP range. ## Remediation and Prevention To stabilize the environment, engineers identified the working network paths and deployed configuration changes to reroute traffic and restore connectivity. GCVE Stretched Cluster inter-zonal connectivity was completely restored for all supported locations on Tuesday, 14 July 2026 at 20:40 US/Pacific. Google is committed preventing a repeat of this issue in the future and is completing the following actions: * **Expanded Testing:** We are adding more detailed GCVE network setups to our existing testing environments. This allows us to automatically test future network updates against these configurations before they go live. * **Service-Level Data Path Failover:** We are implementing additional service-level data path failover mechanisms that actively probe the specific data-tunneling traffic space. This will ensure a path failover is triggered if the data plane itself is degraded even when the BGP control plane remains functional. * **Detailed Alerting**: We are adding faster, more specific alerts for connection issues between zones. This builds on our current platform monitoring to catch minor disruptions early and speed up our response. * **Improved Cluster Resilience:** We are fine-tuning the cluster's high-availability and storage settings. This makes virtual machines more resilient to short network drops, preventing them from restarting unnecessarily if the main site is still healthy. * **Workload Resilience Alignment (Shared Responsibility):** We are proactively reaching out to customers utilizing non-vSAN replicated virtual machine configurations within Stretched Clusters. Because these workloads are pinned to a single zone without active cross-site replication, they cannot survive inter-site network disruptions. We are ready to assist customers in auditing their storage policies, adjusting Stretched Cluster configurations, and planning the secondary zone capacity required to enable robust high-availability failovers. ## Detailed Description of Impact On Tuesday, 14 July 2026 from 10:00 to 20:40 US/Pacific, customers utilizing GCVE Stretched Clusters in the affected zones (australia-southeast2, and europe-west3) experienced inter-site communication failures. For some customers, depending on their architecture, this disruption led to a VMWare HA event causing VM restarts/movement across zones as designed, host disconnects, VSAN alarms and intermittent access to VMware Management (vCenter/NSX Manager) components.

    Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss.

    開始 2026年6月5日 7:00 UTC · 21d 12h

    Issues軽微なインシデント
    1. 2026年6月10日 1:13 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** A fire at a third-party data center facility required an emergency power shutdown of networking equipment, isolating a non-compute local Point of Presence (POP) in Delhi and reducing available network capacity in the metro area. We rerouted significant traffic from the impacted facility in Delhi to address reduced local serving capabilities. As a result, a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers may be impacted by the routing changes made to address reduced local, latency-optimized serving capabilities in Delhi. Affected customers may experience intermittent latency spikes due to demand exceeding capacity across Indian metros and regional ISPs. We are investigating additional traffic mitigations and Internet Edge peering augmentation to alleviate the latency issues affecting our customers. We will provide our next update by Wednesday, 2026-06-10 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    2. 2026年6月10日 22:25 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** A fire at a third-party data center facility required an emergency power shutdown of networking equipment, isolating a non-compute local Point of Presence (POP) in Delhi and reducing available network capacity in the metro area. We rerouted significant traffic from the impacted facility in Delhi to address reduced local serving capabilities. As a result, a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers may be impacted by the routing changes made to address reduced local, latency-optimized serving capabilities in Delhi. Affected customers may experience intermittent latency spikes due to demand exceeding capacity across Indian metros and regional ISPs. We are investigating additional traffic mitigations and Internet Edge peering augmentation to alleviate the latency issues affecting our customers. We are continuing to work with the ISP partners in the region to mitigate any additional impact from unplanned failures. We will provide our next update by Thursday, 2026-06-11 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    3. 2026年6月11日 23:25 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** A fire at a third-party data center facility required an emergency power shutdown of networking equipment, isolating a non-compute local Point of Presence (POP) in Delhi and reducing available network capacity in the metro area. We rerouted significant traffic from the impacted facility in Delhi to address reduced local serving capabilities. As a result, a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers may be impacted by the routing changes made to address reduced local, latency-optimized serving capabilities in Delhi. Affected customers may experience intermittent latency spikes due to demand exceeding capacity across Indian metros and regional ISPs. Initial traffic mitigations have yielded positive results for some Cloud customers. In parallel, we are pursuing additional Internet Edge peering capacity to reduce existing fragility in the metro. We are also optimizing capacity across network backbones to increase additional headroom for VPC customers in the affected region. Additionally, we are planning to augment our local Delhi POP and migrating select peering partners to further increase regional capacity. We will continue to closely monitor latency deviations and packet drops. We will provide our next update by Friday, 2026-06-12 at 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    4. 2026年6月12日 22:50 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** A fire at a third-party data center facility required an emergency power shutdown of networking equipment, isolating a non-compute local Point of Presence (POP) in Delhi and reducing available network capacity in the metro area. We rerouted significant traffic from the impacted facility in Delhi to address reduced local serving capabilities. As a result, a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers may be impacted by the routing changes made to address reduced local, latency-optimized serving capabilities in Delhi. Affected customers may experience intermittent latency spikes due to demand exceeding capacity across Indian metros and regional ISPs. Initial traffic mitigations have yielded positive results for some Cloud customers. In parallel, we are pursuing additional Internet Edge peering capacity to reduce latency in the local Delhi metropolitan area. Further, we are augmenting out-of-region Internet Edge regional peering capacity in Chennai to provide additional load-balancing and redundancy to large ISPs in India (expected to be done by Wednesday, 2026-06-17 PDT). We have optimized capacity across network backbones to increase available headroom. Additionally, we are further augmenting our Delhi backbone capacity (expected to be complete by Monday, 2026-06-15 PDT). We will continue to closely monitor latency deviations and packet drops. We will provide our next update by Monday, 2026-06-15 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    5. 2026年6月15日 23:11 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** A fire at a third-party data center facility required an emergency power shutdown of networking equipment, isolating a non-compute local Point of Presence (POP) in Delhi and reducing available network capacity in the metro area. We rerouted significant traffic from the impacted facility in Delhi to address reduced local serving capabilities. As a result, a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers may be impacted by the routing changes made to address reduced local, latency-optimized serving capabilities in Delhi. Affected customers may experience intermittent latency spikes due to demand exceeding capacity across Indian metros and regional ISPs. Media CDN customers may have experienced higher latencies than normal. Initial traffic mitigations have yielded positive results for some Cloud customers. We have restored a portion of Internet Edge peering capacity to reduce latency in the local Delhi metropolitan area. Further, we are augmenting out-of-region Internet Edge regional peering capacity in Chennai to provide additional load-balancing and redundancy to large ISPs in India (expected to be done by Wednesday, 2026-06-17 PDT). We have optimized capacity across network backbones to increase available headroom. Additionally, we have augmented our Delhi backbone capacity over the weekend. We will continue to closely monitor latency deviations and packet drops. We will provide our next update by Wednesday, 2026-06-17 at 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    6. 2026年6月17日 22:36 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** Traffic rerouting from the impacted Delhi facility has caused a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers to experience intermittent latency spikes as demand exceeds regional capacity. Media CDN customers may also notice increased latencies. Initial traffic mitigations have yielded positive results for some Cloud customers. We have restored a portion of Internet Edge peering capacity to reduce latency in the local Delhi metropolitan area. Further, we are nearly finished with the augmentation of out-of-region Internet Edge regional peering capacity in Chennai to provide additional load-balancing and redundancy to large ISPs in India. We have optimized capacity across network backbones to increase available headroom. Additionally, we have augmented our Delhi backbone capacity. We have also restored additional capacity between Delhi-Chennai and Delhi-Mumbai. We will continue to closely monitor latency deviations and packet drops. We will provide our next update by Monday, 2026-06-22 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    7. 2026年6月22日 23:51 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** Traffic rerouting from the impacted Delhi facility has caused a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers to experience intermittent latency spikes as demand exceeds regional capacity. Media CDN customers may also notice increased latencies. Initial traffic mitigations have yielded positive results for some Cloud customers. We have restored a large portion of Internet Edge peering capacity to reduce latency in the local Delhi metropolitan area. Since the last update, we have completed the augmentation of out-of-region Internet Edge regional peering capacity in Chennai to provide additional load-balancing and redundancy to large ISPs in India. Following safety clearance, teams obtained access to the damaged site and will further restore additional incremental user-facing backbone capacity on Tuesday, 2026-06-23. We have optimized capacity across network backbones to increase available headroom, and augmented our Delhi user-facing backbone capacity. We will continue to closely monitor latency deviations and packet drops. We will provide our next update by Tuesday, 2026-06-23 at 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    8. 2026年6月23日 22:52 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas is experiencing intermittent periods of elevated latency and possible packet loss. **Description** Traffic rerouting from the impacted Delhi facility has caused a subset of Hybrid Connectivity and Virtual Private Cloud (VPC) customers to experience intermittent latency spikes as demand exceeds regional capacity. Media CDN customers may also notice increased latencies. Initial traffic mitigations have yielded positive results for some Cloud customers. We have restored a large portion of Internet Edge peering capacity to reduce latency in the local Delhi metropolitan area. Since the last update, we have completed the augmentation of out-of-region Internet Edge regional peering capacity in Chennai to provide additional load-balancing and redundancy to large ISPs in India. Following safety clearance, our team has accessed the damaged site and is continuing to restore additional capacity throughout this week. We have optimized capacity across network backbones to increase available headroom and augmented our Delhi user-facing backbone capacity. We will continue to closely monitor latency deviations and packet drops. We will provide our next update by Monday, 2026-06-29 at 17:00 PDT. **Symptoms** Customers may experience slightly elevated latency and non-optimal network routing into Google Cloud until the affected facility is fully restored. **Workaround** There is no workaround at this time.

    9. 2026年6月29日 23:06 UTCresolved

      **Summary** Network traffic to Google Cloud originating from Delhi, Chennai, Mumbai and surrounding areas experienced intermittent periods of elevated latency and possible packet loss. **Description** Traffic rerouting from the impacted Delhi facility caused a subset of Hybrid Connectivity, Virtual Private Cloud (VPC) and Media CDN customers to experience intermittent latency spikes as demand exceeded regional capacity. We completed the augmentation of out-of-region Internet Edge regional peering capacity in Chennai to provide additional load-balancing and redundancy to large ISPs in India. Service to a large portion of Internet Edge peering capacity has been restored to reduce latency in the local Delhi metropolitan area. We are now recovered and returned to normal service as of Friday, 2026-06-26 PDT. Following safety clearance, our team restored all lost capacity. We have restored capacity between Delhi-Chennai and Delhi-Mumbai and will continue to closely monitor latency deviations and packet drops. We thank you for your patience during the resolution of this issue. **Symptoms** The impacted customers may have experienced slightly elevated latency and non-optimal network routing into Google Cloud. **Workaround** None

    Vertex AI Gemini API customers experienced increased error rates when accessing the global endpoint.

    開始 2026年2月27日 12:37 UTC · 1h 58m

    Outage重大なインシデント
    1. 2026年2月27日 16:12 UTCresolved

      **Description** \ Between Friday, 2026-02-27, 04:36 and 06:45 PST, customers experienced increased error rates when accessing the Vertex Gemini API Global endpoint. The issue impacted API requests to multiple Gemini models. The incident also caused downstream impact to Dialogflow CX, Agent Assist, Google Cloud Support AI agent, and Customer Experience Agent Studio, which rely on Gemini APIs. Preliminary analysis indicates the issue was triggered by a recent configuration change. Service was fully restored after the configuration change was rolled back. We thank you for your patience while we worked on resolving the issue. **Symptom** \ Customers experienced increased error rates when sending API requests to impacted multiple Gemini models through the global endpoint.

    2. 2026年3月4日 23:23 UTCresolved

      # Preliminary Incident Report We apologize for the inconvenience this service disruption may have caused. We would like to provide some information about this incident below. Please note, this information is based on our best knowledge at the time of posting and is subject to change as our investigation continues. A final Incident Report with preventative actions will be posted once our investigation is complete. If you have experienced impact outside of what is listed below, please reach out to Google Cloud Support using https://cloud.google.com/support. ## Date/Time of the Issue (All time US/Pacific) Incident Start: 27 February 2026 04:37 Incident End: 27 February 2026 06:35 Duration: 1 hour, 58 minutes ## Summary On Friday, 27 February 2026 at 04:37 US/Pacific, customers using Vertex AI Gemini API models (including Gemini 2.0, 2.5, and 3.0 previews) experienced increased error rates. Impacted services included Google Cloud Support, Agent Assist, the Vertex Gemini API and Dialogflow CX in US regions and the global endpoint for a duration of 1 hour and 58 minutes. This is not the level of quality and reliability we strive to offer you, and we are taking immediate steps to improve the platform’s performance and availability. ## Preliminary Root Cause This incident was caused by a configuration change to a safety filtering service that supports all Gemini models. This configuration change enabled a code path that interacted poorly with specific requests, leading to service disruption for the safety filtering service. This in turn led to customers seeing overload (429 and 503) errors for their queries. Google engineers have begun a full root cause analysis and will provide additional information once it is available. ## Remediation Google engineers were alerted to the service disruption via automated alert on Friday, 27 February 2026 04:54 US/Pacific and immediately started an investigation. Engineers identified the faulty configuration change for a safety filtering service and initiated a rollback to restore the previous stable configuration. Additionally, engineers added more capacity to the service. Full service restoration was confirmed by 06:35 US/Pacific as the rollback propagated and servers became healthy. ## Description of Impact On Friday, 27 February 2026 between 04:37 and 06:35 US/Pacific, customers accessing Vertex Gemini APIs may have experienced the following: - Affected Models: All Gemini versions were affected, including gemini-2.5-flash, gemini-2.5-flash-lite, gemini-2.5-pro, gemini-3.0-flash-preview, gemini-3.0-pro-preview, gemini-2.0-flash, gemini-2.0-flash-lite. - Error Experience: - PayGo Customers: Experienced primarily 429 Resource Exhausted errors. - Provisioned Throughput (PT) Customers: Received 503 Service Unavailable errors. - For PT customers, most errors stopped at 06:00. For PayGo customers, most errors stopped at 06:20. - Geographic Scope: Global endpoint, us-central1, us-east4, and other US regions were impacted.

    3. 2026年3月9日 5:25 UTCresolved

      # Incident Report ## Summary On Friday, 27 February 2026 at 04:37 US/Pacific, customers using Vertex AI Gemini API models experienced increased error rates. Impacted services included Google Cloud Support, Agent Assist, Vertex Gemini API and Dialogflow CX in US regions and the global endpoint. The issue persisted for a duration of 1 hour and 58 minutes. This is not the level of quality and reliability we strive to offer you, and we have taken immediate steps to improve the platform’s performance and availability. ## Root Cause This incident was caused by a configuration change to a safety filtering service that supports all Gemini models. For some specific requests, this created code paths that eventually led to service disruptions and capacity loss for the safety filtering service. Consequently, customers encountered overload (429 and 503) errors for their queries, with some users reporting elevated error rates for specific models in US regions. ## Remediation and Prevention Google engineers were alerted to the issue via our automated monitoring system on Friday, 27 February 2026 04:54 US/Pacific and immediately started an investigation. Engineers identified the faulty configuration change and initiated a rollback to restore the previous stable configuration. Engineers also added more capacity to the service to stabilize it. Full service restoration was confirmed by 06:35 US/Pacific as the rollback propagated and servers became healthy. \ \ Google is committed to preventing a repeat of this issue and is taking the following actions: * Reinforcing rollout processes to include mandatory validation checkpoints. * Improving alerting systems to monitor critical dependencies more closely. ## ## Detailed Description of Impact On Friday, 27 February 2026 between 04:37 and 06:35 US/Pacific, customers accessing Vertex Gemini APIs may have experienced the following: * **Affected Models:** All Vertex AI Gemini API models were affected, including gemini-2.5-flash, gemini-2.5-flash-lite, gemini-2.5-pro, gemini-3.0-flash-preview, gemini-3.0-pro-preview, gemini-2.0-flash, gemini-2.0-flash-lite. * **Error Experience:** * **PayGo Customers:** Experienced primarily 429 Resource Exhausted errors. * **Provisioned Throughput (PT) Customers:** Received 503 Service Unavailable errors. * For PT customers, most errors stopped at **06:00**. For PayGo customers, most errors stopped at **06:20**. * **Geographic Scope:** Global endpoint, us-central1, us-east4, and other US regions were impacted.

    We are investigating elevated error rates with multiple products in us-east1

    開始 2025年7月18日 14:42 UTC · 2h 5m

    Outage重大なインシデント
    1. 2025年7月18日 15:54 UTCresolved

      We're currently experiencing elevated latency and error rates for several Cloud services in the us-east1 region, beginning at 7:06 AM PDT today, July 18, 2025. Our initial investigation points to a hardware infrastructure failure as the likely cause. We apologize for any disruption this may be causing. We'll provide an update with more details by 9:15 AM PDT today.

    2. 2025年7月18日 16:29 UTCresolved

      Our engineers have confirmed that us-east1-b is partially affected. All other zones in us-east1 are currently operating normally. Our engineers have recovered the failed hardware and are currently recovering the network control plane in the affected zones. We'll provide another update by 10:00 AM US/Pacific, July 18, 2025.

    3. 2025年7月18日 16:58 UTCresolved

      Our engineers have successfully recovered the network control plane in the affected us-east1 zones. We're seeing multiple services reporting full recovery, and product engineers are now validating the remaining services. We'll provide another update with more details by 10:30 AM US/Pacific, July 18, 2025.

    4. 2025年7月18日 17:32 UTCresolved

      Our engineers have successfully recovered the network control plane in the affected us-east1 zones. We're seeing multiple services reporting full recovery, and product engineers continue to validate the remaining services. We'll provide another update with more details by 11:00 AM US/Pacific, July 18, 2025.

    5. 2025年7月18日 18:03 UTCresolved

      The issue has been resolved for all affected products as of 2025-07-18 09:47 US/Pacific. From preliminary analysis, during a routine maintenance of our network in us-east1-b, we experienced elevated packet loss, causing service disruption in the zone. We will publish a full Incident Report with root cause once we have completed our internal investigations. We thank you for your patience while we worked on resolving the issue.

    6. 2025年7月18日 22:08 UTCresolved

      # Mini Incident Report We apologize for the inconvenience this service disruption/outage may have caused. We would like to provide some information about this incident below. Please note, this information is based on our best knowledge at the time of posting and is subject to change as our investigation continues. If you have experienced impact outside of what is listed below, please reach out to Google Cloud Support using https://cloud.google.com/support or to Google Workspace Support using help article https://support.google.com/a/answer/1047213. (All Times US/Pacific) **GCP Impact start and end time:** 18 July 2025 08:10 - 09:47 **Duration:** 1 hour 37 minutes **GWS Impact start and end time:** 18 July 2025 08:10 - 08:40 **Duration:** 30 minutes **Regions/Zones:** us-east1 **Description:** On Friday, 18 July 2025 08:10 US/Pacific multiple GCP and GWS products experienced elevated latencies and error rates in the us-east1 region for a duration of up to 1 hour and 37 minutes. Based on the preliminary analysis, the root cause of the issue is a procedural error during a planned hardware maintenance in one of our data centers in the us-east1 region. Our engineering team mitigated the issue by draining traffic away from the clusters and then restoring the affected hardware. Google will be completing a full incident report in the following days that will provide a full root cause and preventive actions. **Customer Impact:** The affected GCP and GWS products experienced elevated latencies and errors rates in the us-east1 region. **Affected Products:** **GCP :** AlloyDB for PostgreSQL, Apigee, Artifact Registry, Cloud Armor, Cloud Billing, Cloud Build, Cloud External Key Manager, Cloud Filestore, Cloud HSM, Cloud Key Management Service, Cloud Load Balancing, Cloud Monitoring, Cloud Run, Cloud Spanner, Cloud Storage for Firebase, Cloud Workflows, Database Migration Service, Dialogflow CX, Dialogflow ES, Google BigQuery, Google Cloud Dataflow, Google Cloud Dataproc, Google Cloud Storage, Google Cloud Support, Google Cloud Tasks, Google Compute Engine, Hybrid Connectivity, Media CDN, Network Telemetry, Private Service Connect, Secret Manager, Service Directory, Vertex AI Online Prediction, Virtual Private Cloud (VPC) **Workspace :** Gmail, Google Meet, Google Drive, Google Chat, Google Calendar, Google Groups, Google Doc/Editors, Google Voice **Google SecOps:** Google SecOps SOAR & Google SecOps

    7. 2025年7月22日 13:42 UTCresolved

      ## \# Incident Report ## \#\# Summary On Friday, 18 July 2025 07:50 US/Pacific, several Google Cloud Platform (GCP) and Google Workspace (GWS) products experienced elevated latencies and error rates in the us-east1 region for a duration of up to 1 hour and 57 minutes. **GCP Impact Duration:** 18 July 2025 07:50 \- 09:47 US/Pacific : 1 hour 57 minutes **GWS Impact Duration:** 18 July 2025 07:50 \- 08:40 US/Pacific : 50 minutes We sincerely apologize for this incident, which does not reflect the level of quality and reliability we strive to offer. We are taking immediate steps to improve the platform’s performance and availability. ## ## \#\# Root Cause The service interruption was triggered by a procedural error during a planned hardware replacement in our datacenter. An incorrect physical disconnection was made to the active network switch serving our control plane, rather than the redundant unit scheduled for removal. The redundant unit had been properly de-configured as part of the procedure, and the combination of these two events led to partitioning of the network control plane. Our network is designed to withstand this type of control plane failure by failing open, continuing operation. However, an operational topology change while the network control plane was in a failed open state caused our network fabric's topology information to become stale. This led to packet loss and service disruption until services were moved away from the fabric and control plane connectivity was restored. ## \#\# Remediation and Prevention Google engineers were alerted to the outage by our monitoring system on 18 July 2025 07:06 US/Pacific and immediately started an investigation. The following timeline details the remediation and restoration efforts: * **07:39 US/Pacific**: The underlying root cause (device disconnect) was identified and onsite technicians were engaged to reconnect the control plane device and restore control plane connectivity. At that moment, network failure open mechanisms worked as expected and no impact was observed. * **07:50 US/Pacific**: A topology change led to traffic being routed suboptimally, due to the network being in a fail open state. This caused congestion on the subset of links, packet loss, and latency to customer traffic. Engineers made a decision to move traffic away from the affected fabric, which mitigated the impact for the majority of the services. * **08:40 US/Pacific**: Engineers mitigated Workspace impact by shifting traffic away from the affected region. * **09:47 US/Pacific**: Onsite technicians reconnected the device, control plane connectivity was fully restored and all services were back to stable state. Google is committed to preventing a repeat of the issue in the future, and is completing the following actions: * Pause non-critical workflows until safety controls are implemented (complete). * Strengthen safety controls for hardware upgrade workflows by end of Q3 2025\. * Design and implement a mechanism to prevent control plane partitioning in case of dual failure of upstream routers by end of Q4 2025\. ## \#\# Detailed Description of Impact \#\#\# GCP Impact: Multiple products in us-east1 were affected by the loss of network connectivity, with the most significant impacts seen in us-east1-b. Other regions were not affected. The outage caused a range of issues for customers with zonal resources in the region, including packet loss across VPC networks, increased error rates and latency, service unavailable (503) errors, and slow or stuck operations up to loss of networking connectivity. While regional products were briefly impacted, they recovered quickly by failing over to unaffected zones. A small number (0.1%) of Persistent Disks in us-east1-b were unavailable for the duration of the outage: these disks became available once the outage was mitigated, with no customer data loss. \#\#\# GWS Impact: A small subset of Workspace users, primarily around the Southeast US, experienced varying degrees of unavailability and increased delays across multiple products, including Gmail, Google Meet, Google Drive, Google Chat, Google Calendar, Google Groups, Google Doc/Editors, and Google Voice.