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Ref rewinds observed in high traffic gerrit environments #281
Description
Version
6.10
Operating System
Linux/Unix
Bug description
In a high traffic gerrit environment we are observing rare cases when refs get rewinded.
Actual behavior
In high traffic gerrit environment when multiple actions happen on a change, possibly a comment/vote and them submitting the change, We did see through our logs that meta ref did update to point to new commit created using submit strategy and then was rewinded to reflect the other meta ref update.
Expected behavior
Concurrent updates should either fail with a lock failure or should be applied in correct order.
Relevant log output
Other information
No response
Activity
lucamilanesio commentedon Aug 13, 2026
The fix to this problem is fixing the unlocking during ref deletions. Did you verify that a deletion was involved in the refs' rewinding?
lucamilanesio commentedon Aug 13, 2026
I see that it wasn't any deletion of refs but simply the repacking of loose refs. Makes sense to me.
achakilam-nv commentedon Aug 14, 2026
We've seen a recent case something like below.