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https://issues.apache.org/jira/browse/GEODE-8475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17209034#comment-17209034
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ASF subversion and git services commented on GEODE-8475:
--------------------------------------------------------
Commit 9c22643a42de156cde149e74257047d0849db23e in geode's branch
refs/heads/support/1.12 from Xiaojian Zhou
[ https://gitbox.apache.org/repos/asf?p=geode.git;h=9c22643 ]
GEODE-8475: Resolve a potential dead lock in ParallelGatewaySenderQueue (#5492)
Co-authored-by: Darrel Schneider <dar...@vmware.com>
(cherry picked from commit b62e033af490d6f1e8f40621ff084b099f5b52e8)
> 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
> Assignee: Xiaojian Zhou
> Priority: Major
> Labels: GeodeOperationAPI, pull-request-available
> Fix For: 1.13.0, 1.14.0
>
>
> 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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