[HIVE-6082] Certain KeeperException should be ignored in ZooKeeperHiveLockManage.unlockPrimitive

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.12.0
• Fix Version/s: 0.13.0
• Assignee: Chaoyu Tang
• Reporter: Chaoyu Tang
• Created: 20/Dec/13 14:40
• Updated: 30/Dec/13 20:46
• Resolved: 30/Dec/13 20:46

Description

KeeperException.NoNodeException and NotEmptyException should be ignored when deleting a zLock or its parent in ZooKeeperHiveLockManager unlockPrimitive. The exceptions can happen:
1) ZooKeeperHiveLockManager retries deleting a zLock after a failure but it has been deleted.
2) a race condition where another process adds a zLock just before it is about to be deleted.
Otherwise, unlock may unnecessarily be retried for numRetriesForUnLock times.