Make buildpack position updates concurrency-safe - #5497
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serdarozerr wants to merge 1 commit into
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serdarozerr wants to merge 1 commit into
serdarozerr wants to merge 1 commit into
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Concurrent PATCH /v3/buildpacks/:guid position changes could leave the list with a duplicate position and an adjacent gap. The buildpack is loaded before the lock, so move_to computed its shift range from a stale in-memory position. Fixed by calling buildpack.refresh under the lock. Added a deterministic regression test (fails without the fix, passes with it)
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