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    Semaphore outage history

    76 recorded Semaphore incidents since December 2024, with official updates, affected components, duration and resolution information.

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    Delays in Job Processing

    Started October 26, 2026 at 11:40 PM UTC · Ongoing

    Pending
    Affected components
    Semaphore
    1. October 26, 2026 at 11:40 PM UTCinvestigating

      We are currently investigating this issue.

    2. October 27, 2026 at 12:10 AM UTCidentified

      The issue has been identified, and we are continuing to monitor the situation.

    Delays in Job Processing

    Started October 26, 2026 at 3:02 PM UTC · 2h 41m

    IssuesMinor incident
    Affected components
    Semaphore
    1. October 26, 2026 at 3:02 PM UTCinvestigating

      We are currently investigating this issue.

    2. October 26, 2026 at 4:03 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. October 26, 2026 at 5:02 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    4. October 26, 2026 at 5:43 PM UTCresolved

      This incident has been resolved.

    Delays in Job Processing

    Started October 22, 2026 at 3:08 PM UTC · 2h 15m

    IssuesMinor incident
    Affected components
    Semaphore
    1. October 22, 2026 at 3:08 PM UTCinvestigating

      We are currently investigating this issue.

    2. October 22, 2026 at 4:03 PM UTCinvestigating

      We are continuing to investigate this issue.

    3. October 22, 2026 at 5:01 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    4. October 22, 2026 at 5:12 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    5. October 22, 2026 at 5:23 PM UTCresolved

      This incident has been resolved.

    Delays in Job Processing

    Started October 21, 2026 at 2:14 PM UTC · 3h 47m

    IssuesMinor incident
    Affected components
    Semaphore
    1. October 21, 2026 at 4:33 PM UTCmonitoring

      We are continuing to monitor for any further issues.

    2. October 21, 2026 at 5:02 PM UTCinvestigating

      We are currently investigating this issue.

    3. October 21, 2026 at 5:18 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    4. October 21, 2026 at 5:40 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    5. October 21, 2026 at 6:01 PM UTCresolved

      This incident has been resolved.

    Delays in jobs scheduling

    Started October 20, 2026 at 9:58 PM UTC · 2h 1m

    Pending
    Affected components
    Semaphore
    1. October 20, 2026 at 9:58 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    2. October 20, 2026 at 10:27 PM UTCidentified

      We are continuing to work on a fix for this issue.

    3. October 20, 2026 at 10:44 PM UTCidentified

      We're starting to see improvements in job scheduling times, although some delays may still occur. We're continuing to monitor the situation closely and will provide further updates as we make progress.

    4. October 20, 2026 at 11:10 PM UTCmonitoring

      Job scheduling times have returned to normal. We're continuing to monitor the situation closely to ensure service continues running as expected.

    5. October 20, 2026 at 11:30 PM UTCmonitoring

      We are continuing to monitor the situation.

    6. October 20, 2026 at 11:59 PM UTCresolved

      This incident has been resolved.

    Delays in job processing

    Started October 14, 2026 at 3:10 PM UTC · 2h 8m

    IssuesMinor incident
    Affected components
    Semaphore
    1. October 14, 2026 at 3:10 PM UTCinvestigating

      Jobs are currently experiencing delays during initialization. We are investigating the issue and will share updates as we have more information.

    2. October 14, 2026 at 3:55 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. October 14, 2026 at 4:19 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    4. October 14, 2026 at 5:09 PM UTCmonitoring

      We are continuing to monitor for any further issues.

    5. October 14, 2026 at 5:17 PM UTCresolved

      This incident has been resolved.

    Delays in job processing

    Started October 13, 2026 at 3:16 PM UTC · 2h 57m

    IssuesMinor incident
    Affected components
    Semaphore
    1. October 13, 2026 at 3:16 PM UTCinvestigating

      We are currently investigating this issue.

    2. October 13, 2026 at 3:49 PM UTCinvestigating

      We are continuing to investigate this issue.

    3. October 13, 2026 at 4:47 PM UTCidentified

      We're starting to see improvements in job processing times, although some delays may still occur. We're continuing to monitor the situation closely and will provide further updates as we make progress.

    4. October 13, 2026 at 5:43 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    5. October 13, 2026 at 6:13 PM UTCresolved

      This incident has been resolved.

    Intermittent network connectivity issues

    Started October 13, 2026 at 1:53 PM UTC · 8h 37m

    IssuesMinor incident
    Affected components
    Semaphore
    1. October 13, 2026 at 1:53 PM UTCinvestigating

      We are currently investigating this issue.

    2. October 13, 2026 at 2:40 PM UTCidentified

      The issue has been identified.

    3. October 13, 2026 at 3:42 PM UTCidentified

      We are continuing to work on a fix for this issue.

    4. October 13, 2026 at 4:34 PM UTCinvestigating

      We identified that the intermittent network connectivity issues are likely related to our infrastructure provider's recent maintenance. Although the maintenance is complete, we're still experiencing intermittent connection interruptions and slow network performance.

    5. October 13, 2026 at 6:16 PM UTCinvestigating

      We are continuing to investigate this issue.

    6. October 13, 2026 at 6:31 PM UTCidentified

      Our investigation has identified intermittent connectivity issues between our infrastructure provider’s network and certain Google services. This may affect artifact uploads and downloads, as well as jobs that depend on Google-hosted resources. We’ve gathered diagnostic information and are escalating the issue to our infrastructure provider for further investigation. We’ll continue monitoring the situation and share updates as significant new information becomes available.

    7. October 13, 2026 at 9:45 PM UTCmonitoring

      Network connectivity is returning to normal, and the affected services should no longer be impacted. We will continue monitoring the situation closely. If you continue to experience similar issues, please contact our support team at [email protected].

    8. October 13, 2026 at 10:30 PM UTCresolved

      This incident has been resolved.

    Delays in job processing

    Started September 17, 2026 at 2:17 PM UTC · 52m

    OutageMajor incident
    Affected components
    Semaphore
    1. September 17, 2026 at 2:17 PM UTCinvestigating

      We are currently investigating this issue.

    2. September 17, 2026 at 2:29 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. September 17, 2026 at 2:47 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    4. September 17, 2026 at 3:09 PM UTCresolved

      This incident has been resolved.

    Intermittent cache connection errors

    Started September 17, 2026 at 1:33 PM UTC · 38m

    IssuesMinor incident
    Affected components
    Semaphore
    1. September 17, 2026 at 1:33 PM UTCinvestigating

      We are currently investigating this issue.

    2. September 17, 2026 at 1:52 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. September 17, 2026 at 1:56 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    4. September 17, 2026 at 2:12 PM UTCresolved

      This incident has been resolved.

    Delays in job processing

    Started September 15, 2026 at 2:45 PM UTC · 2h 1m

    IssuesMinor incident
    Affected components
    Semaphore
    1. September 15, 2026 at 2:45 PM UTCinvestigating

      We are currently investigating this issue.

    2. September 15, 2026 at 2:52 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. September 15, 2026 at 3:49 PM UTCidentified

      We are continuing to work on a fix for this issue.

    4. September 15, 2026 at 4:16 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    5. September 15, 2026 at 4:46 PM UTCresolved

      This incident has been resolved.

    Periodic authentication failure with GitHub repositories

    Started September 2, 2026 at 4:08 PM UTC · 1d 0h

    IssuesMinor incident
    Affected components
    Semaphore
    1. September 2, 2026 at 9:30 PM UTCidentified

      The wider situation impacting HTTPS operations, which is also affecting Semaphore and our users, has started occurring again: https://github.com/orgs/community/discussions/206581 As a workaround, you can configure git to use only HTTP/1.1, using the following command: git config --global http.version HTTP/1.1 We are continuing to monitor the situation on our end and will share further updates as they become available.

    2. September 2, 2026 at 10:07 PM UTCidentified

      Our engineers are actively monitoring the ongoing situation affecting HTTPS operations: https://github.com/orgs/community/discussions/206581. We’ll share the next update once we have new information from GitHub. As a workaround, you can configure git to use only HTTP/1.1, using the following command: git config --global http.version HTTP/1.1

    3. September 3, 2026 at 12:45 PM UTCidentified

      Our engineers are actively monitoring the intermittent issue affecting Git operations over HTTPS. We will share another update when more information becomes available. To prevent affected builds from stalling while waiting for credentials, our engineering team has implemented fail-fast behavior. Affected builds will now fail promptly, reducing unnecessary runtime. If the issue persists after rerunning the job, add the following command to the job before the affected Git operation to force Git to use HTTP/1.1: git config --global http.version HTTP/1.1

    4. September 3, 2026 at 4:41 PM UTCresolved

      Semaphore is currently operating normally, which is why we’re marking this incident as resolved. GitHub confirmed that the behavior affecting unauthenticated Git operations is the result of an intentional change on their end rather than a bug. You can read their latest statement here: https://github.com/orgs/community/discussions/206581#discussioncomment-18269083 For builds affected by this behavior, the previously shared workaround remains available. Configure Git to use HTTP/1.1 before running the affected Git operation: git config --global http.version HTTP/1.1 We will add this instruction and further context to our documentation. Any additional guidance from Semaphore will be shared through in-app notifications. For further assistance, contact our support team at [email protected].

    Periodic authentication failure with GitHub repositories

    Started September 2, 2026 at 11:17 AM UTC · 4h 0m

    IssuesMinor incident
    Affected components
    Semaphore
    1. September 2, 2026 at 11:17 AM UTCinvestigating

      We are currently investigating this issue.

    2. September 2, 2026 at 11:44 AM UTCinvestigating

      We are still looking into the cause of this issue, but as a temporary workaround, you can add the following environment variable to your jobs, which will cause them to immediately fail and not hang: GIT_TERMINAL_PROMPT=0 After they fail, you can rerun the pipeline, and only the failed jobs should rerun, allowing you to work through this issue until we have more information to share.

    3. September 2, 2026 at 12:18 PM UTCinvestigating

      We are continuing to investigate this issue.

    4. September 2, 2026 at 12:53 PM UTCidentified

      We have found that this is currently a wider situation impacting HTTPS operations, which is also affecting Semaphore and our users. You can read more about this in this thread: https://github.com/orgs/community/discussions/206581 As a workaround, you can configure git to use only HTTP/1.1, using the following command: git config --global http.version HTTP/1.1 Please also note that we are continuing to monitor and investigate this situation on our end.

    5. September 2, 2026 at 1:56 PM UTCidentified

      We have found that this is currently a wider situation impacting HTTPS operations, which is also affecting Semaphore and our users. You can read more about this in this thread: https://github.com/orgs/community/discussions/206581 As a workaround, you can configure git to use only HTTP/1.1, using the following command: git config --global http.version HTTP/1.1 We are continuing to monitor and investigate this situation on our end.

    6. September 2, 2026 at 2:19 PM UTCmonitoring

      There was a wider situation impacting HTTPS operations, which also affected Semaphore and our users https://github.com/orgs/community/discussions/206581 The issue has since appeared to subside, but we're continuing to monitor the situation on our end.

    7. September 2, 2026 at 3:16 PM UTCresolved

      This incident has been resolved.

    Delays in job processing

    Started August 31, 2026 at 12:06 PM UTC · 10h 5m

    OutageCritical incident
    Affected components
    Semaphore
    1. August 31, 2026 at 12:06 PM UTCinvestigating

      We are currently investigating this issue.

    2. August 31, 2026 at 12:56 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. August 31, 2026 at 3:32 PM UTCidentified

      We’ve identified network connectivity issues between our control plane and build servers. We’re actively working to restore normal service.

    4. August 31, 2026 at 6:22 PM UTCidentified

      We’re still working to resolve the network connectivity issues between our control plane and build servers. We’ll share another update as soon as we have more information.

    5. August 31, 2026 at 7:21 PM UTCidentified

      Our team is continuing to work on a fix for this issue.

    6. August 31, 2026 at 7:49 PM UTCidentified

      We are continuing to work on a fix for this issue.

    7. August 31, 2026 at 8:18 PM UTCidentified

      Our engineering team is actively working to resolve this issue.

    8. August 31, 2026 at 8:35 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    9. August 31, 2026 at 9:09 PM UTCmonitoring

      We are continuing to monitor for any further issues.

    10. August 31, 2026 at 9:44 PM UTCmonitoring

      Our team is still monitoring the results.

    11. August 31, 2026 at 10:11 PM UTCresolved

      This incident has been resolved.

    Delays in job processing

    Started August 28, 2026 at 7:17 PM UTC · 1h 53m

    IssuesMinor incident
    Affected components
    Semaphore
    1. August 28, 2026 at 7:17 PM UTCinvestigating

      We are currently investigating this issue.

    2. August 28, 2026 at 8:11 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. August 28, 2026 at 8:31 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    4. August 28, 2026 at 9:09 PM UTCresolved

      This incident has been resolved.

    Delays in Job Processing

    Started August 27, 2026 at 8:09 PM UTC · 52m

    OutageMajor incident
    Affected components
    Semaphore
    1. August 27, 2026 at 8:09 PM UTCinvestigating

      We are currently investigating this issue.

    2. August 27, 2026 at 8:11 PM UTCinvestigating

      We are continuing to investigate this issue.

    3. August 27, 2026 at 8:26 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    4. August 27, 2026 at 8:35 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    5. August 27, 2026 at 9:01 PM UTCresolved

      This incident has been resolved.

    Platform Outage

    Started August 27, 2026 at 6:43 PM UTC · 47m

    OutageCritical incident
    Affected components
    Semaphore
    1. August 27, 2026 at 6:43 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    2. August 27, 2026 at 7:00 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    3. August 27, 2026 at 7:15 PM UTCmonitoring

      We are continuing to monitor for any further issues.

    4. August 27, 2026 at 7:30 PM UTCresolved

      This incident has been resolved.

    Degraded performance on r1-standard machines

    Started August 25, 2026 at 8:35 AM UTC · 6h 12m

    IssuesMinor incident
    Affected components
    Semaphore
    1. August 25, 2026 at 8:35 AM UTCinvestigating

      We are currently investigating this issue.

    2. August 25, 2026 at 8:44 AM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. August 25, 2026 at 9:19 AM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    4. August 25, 2026 at 12:57 PM UTCmonitoring

      We are continuing to monitor for any further issues.

    5. August 25, 2026 at 2:00 PM UTCidentified

      We have observed continued impact while monitoring. The issue remains identified, and our team is working on a resolution.

    6. August 25, 2026 at 2:17 PM UTCidentified

      We are continuing to work on a fix for this issue.

    7. August 25, 2026 at 2:47 PM UTCresolved

      This incident has been resolved.

    Issues with Bitbucket integration

    Started August 21, 2026 at 7:14 PM UTC · 1h 34m

    OutageMajor incident
    Affected components
    Semaphore
    1. August 21, 2026 at 7:14 PM UTCinvestigating

      We are currently investigating this issue.

    2. August 21, 2026 at 7:26 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    3. August 21, 2026 at 8:03 PM UTCidentified

      We are continuing to work on a fix for this issue.

    4. August 21, 2026 at 8:27 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    5. August 21, 2026 at 8:47 PM UTCresolved

      This incident has been resolved.

    Delays in job processing - F1 machines

    Started August 18, 2026 at 3:07 PM UTC · 2h 41m

    IssuesMinor incident
    Affected components
    Semaphore
    1. August 18, 2026 at 3:07 PM UTCinvestigating

      We are currently investigating this issue.

    2. August 18, 2026 at 3:15 PM UTCinvestigating

      Jobs configured to run on F1 machines may take longer than usual to start.

    3. August 18, 2026 at 3:18 PM UTCidentified

      The issue has been identified and a fix is being implemented.

    4. August 18, 2026 at 3:28 PM UTCidentified

      The issue is still ongoing, and the engineering team is actively working on a fix.

    5. August 18, 2026 at 4:28 PM UTCidentified

      We are continuing to work on a fix for this issue.

    6. August 18, 2026 at 5:16 PM UTCmonitoring

      A fix has been implemented and we are monitoring the results.

    7. August 18, 2026 at 5:47 PM UTCresolved

      This incident has been resolved.