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mount/manager: check lease bucket in rollback - #14553
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samuelkarp wants to merge 1 commit into
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The rollback of a failed Activate assumed its lease bucket still exists. A client of the mounts gRPC service can get the bucket deleted while the activation is running: 1. Activate(A) under lease L adds A to L's bucket and starts mounting. 2. Deactivate(A) removes A from L's bucket and leaves it empty. 3. Activate(B) under L fails. Its rollback deletes the empty bucket. 4. Activate(A) fails. Its rollback panics on the nil bucket. Assisted-by: Claude Code:claude-opus-5-5 Signed-off-by: Samuel Karp <me@samuelkarp.com>
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🟢 Approval recommended
No active review issues are reported for the lease-bucket rollback cleanup change.
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What changed in this PR
This PR prevents a panic during failed mount activation when concurrent operations have already deleted the associated lease bucket.
Changes:
- Keep the empty-bucket check and deletion inside the existing nil guard.
- Add a regression test that reproduces the rollback sequence using coordinated mount failures.
| File | Description |
|---|---|
core/mount/manager/manager.go |
Guard rollback cleanup against an already-deleted lease bucket. |
core/mount/manager/manager_test.go |
Verify that rollback returns an error without panicking after lease-bucket deletion. |
Review effort: Balanced
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The rollback of a failed Activate assumed its lease bucket still exists. A client of the mounts gRPC service can get the bucket deleted while the activation is running:
Assisted-by: Claude Code:claude-opus-5-5