2023-05-12: Cannot merge changes on the www-gitlab-com project

Customer Impact

It appears that this is only affecting a single project for GitLab team members.

Current Status

An MR has been identified as a culprit and is being reverted and deployed.

📝 Summary for CMOC notice / Exec summary:

1. Customer Impact: users receiving a 500 error when pushing changes.
2. Service Impact: ServicePraefect
3. Impact Duration: 2023-05-12 06:00 UTC - end time UTC ( duration in minutes )
4. Root cause: TBD

📚 References and helpful links

Recent Events (available internally only):

• Feature Flag Log - Chatops to toggle Feature Flags Documentation
• Infrastructure Configurations
• GCP Events (e.g. host failure)

Deployment Guidance

• Deployments Log | Gitlab.com Latest Updates
• Reach out to Release Managers for S1/S2 incidents to discuss Rollbacks, Hot Patching or speeding up deployments. | Rollback Runbook | Hot Patch Runbook

Use the following links to create related issues to this incident if additional work needs to be completed after it is resolved:

• Corrective action ❙ Infradev
• Incident Review ❙ Infra investigation followup
• Confidential Support contact ❙ QA investigation

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