Incident with Pull Requests

Resolved

On April 9, 2025, between 7:01 UTC and 9:31 UTC, the Pull Requests service was degraded and failed to update refs for repositories with higher traffic. This was due to a repository migration creating a larger than usual number of enqueued jobs. This resulted in an increase in job failures and delays for non-migration sourced jobs.We declared an incident once we confirmed that this issue was not isolated to the migrating repository and other repositories were also failing to process ref updates.We mitigated the incident by shifting the migration jobs to a different job queue. To avoid problems like this in the future, we are revisiting our repository migration process and are working to isolate potentially problematic migration workloads from non-migration workloads.

Investigating

We saw a period of delays on Pull request experiences. The impact is over at the moment, but we are investigating to prevent a repeat.

Investigating

We are investigating reports of degraded performance for Pull Requests