[jira] [Created] (GEODE-8475) Resolve a potential dead lock in ParallelGatewaySenderQueue

["Xiaojian Zhou (Jira)" <ji...@apache.org>]

Xiaojian Zhou created GEODE-8475:
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             Summary: Resolve a potential dead lock in ParallelGatewaySenderQueue 
                 Key: GEODE-8475
                 URL: https://issues.apache.org/jira/browse/GEODE-8475
             Project: Geode
          Issue Type: Improvement
            Reporter: Xiaojian Zhou


When brq is created but encountered a failed GII, enqueue to it could have a potential deadlock:

Thread-1:
ParallelGatewaySenderQueue.put() will get a brq.getInitializationLock().readLock().lock() (lock-A’s read lock). Then during the put operation, it will try to call lockWhenRegionIsInitializing() to get failedInitialImageLock.readLock().lock (lock-B’s read lock)

Thread-2: 
PRDS.createBucketRegion() will trigger GII but failed. So it will call cleanUpAfterFailedGII(), where it will call lockFailedInitialImageWriteLock
() to get lock-B’s write lock first. Then call BucketRegionQueue.clearEntries().
It will call getInitializationLock().writeLock().lock() (lock-A’s write lock).

To fix it, we need to let thread-1 to get failedInitialImageLock.readLock() (lock-B) before requesting lock-A. 




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