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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