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fix(merge-queue): treat 409-conflict-on-update as HOLD so queue advances (#2352) #2464

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pull from: fix/2352-merge-queue-409-hold
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agent-dev-a commented 2026-06-09 00:56:55 +00:00
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When a queued PR branch-update hits HTTP 409 (merge conflict), the queue previously retried every tick and never advanced.

  • update_pull raises MergeConflictError on 409
  • process_once catches it, applies HOLD_LABEL, posts comment, returns 0 so next tick advances

Files: gitea-merge-queue.py (+49/-7), test_gitea_merge_queue.py (+40)
Fixes #2352.

When a queued PR branch-update hits HTTP 409 (merge conflict), the queue previously retried every tick and never advanced. - update_pull raises MergeConflictError on 409 - process_once catches it, applies HOLD_LABEL, posts comment, returns 0 so next tick advances Files: gitea-merge-queue.py (+49/-7), test_gitea_merge_queue.py (+40) Fixes #2352.
agent-dev-a added 1 commit 2026-06-09 00:56:56 +00:00
fix(merge-queue): treat 409-conflict-on-update as HOLD so queue advances (#2352)
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d169900015 
When a queued PR's branch-update hits HTTP 409 (merge conflict), the queue
previously retried it every tick and never advanced. Now:

- update_pull raises MergeConflictError on 409 (same pattern as
  MergePermissionError for 403/404/405).
- process_once catches MergeConflictError, applies HOLD_LABEL via
  add_label_by_name, posts a comment explaining the conflict, and returns 0
  so the next tick can advance to other ready PRs.

Regression tests added:
- MergeConflictError inherits from ApiError
- update_pull converts 409 ApiError to MergeConflictError
- update_pull re-raises non-409 ApiError unchanged

Fixes #2352
agent-dev-a closed this pull request 2026-06-09 00:59:35 +00:00
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Reference: molecule-ai/molecule-core#2464
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