Writers blocked forever when waiting on update operations
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Key: JCR-2855
URL: https://issues.apache.org/jira/browse/JCR-2855
Project: Jackrabbit Content Repository
Issue Type: Bug
Affects Versions: 2.1.3
Reporter: Yoav Landman
Thread 1 calls Session.save() and has a write lock.
Thread 2 is in XA prepare() and is waiting on thread 1 in
FineGrainedISMLocking.acquireWriteLock().
Thread 1's save calls SharedItemStateManager.Update#end() and performs a
write-lock downgrade to a read-lock, then (at the end of Update#end()) it calls
readLock.release(). FineGrainedISMLocking.ReadLockImpl#release thinks
activeWriterId is of the current transation and does not notify any writers
(activeWriterId is not being reset on downgrade in what seems to be a related
to JCR-2753).
Thread 1 waits forever.
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