[jira] [Created] (NIFI-4167) Occasional deadlock when trying to clean up old Content Claims

["Mark Payne (JIRA)" <ji...@apache.org>]

Mark Payne created NIFI-4167:
--------------------------------

             Summary: Occasional deadlock when trying to clean up old Content Claims
                 Key: NIFI-4167
                 URL: https://issues.apache.org/jira/browse/NIFI-4167
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
            Reporter: Mark Payne
            Assignee: Mark Payne
            Priority: Critical
             Fix For: 1.4.0


Occasionally we'll see the Content Repository stop cleaning up old claims. A thread dump shows:

{code}
"FileSystemRepository Workers Thread-3" Id=97 BLOCKED on org.apache.nifi.controller.repository.claim.StandardResourceClaim@6b5aa020 
at org.apache.nifi.controller.repository.claim.StandardResourceClaimManager.getClaimantCount(StandardResourceClaimManager.java:73) 
at org.apache.nifi.controller.repository.claim.StandardResourceClaim.isInUse(StandardResourceClaim.java:120) 
at org.apache.nifi.controller.repository.FileSystemRepository.remove(FileSystemRepository.java:612) 
at org.apache.nifi.controller.repository.FileSystemRepository.access$1200(FileSystemRepository.java:83) 
at org.apache.nifi.controller.repository.FileSystemRepository$ArchiveOrDestroyDestructableClaims.run(FileSystemRepository.java:1442) 
{code}

While another thread shows that it's being marked as Destructable:

{code}
"pool-10-thread-1" Id=132 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@38063d7e 
at sun.misc.Unsafe.park(Native Method) 
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215) 
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078) 
at java.util.concurrent.LinkedBlockingQueue.offer(LinkedBlockingQueue.java:385) 
at org.apache.nifi.controller.repository.claim.StandardResourceClaimManager.markDestructable(StandardResourceClaimManager.java:152) 
- waiting on org.apache.nifi.controller.repository.claim.StandardResourceClaim@6b5aa020 
at org.apache.nifi.controller.repository.WriteAheadFlowFileRepository.markDestructable(WriteAheadFlowFileRepository.java:186) 
at org.apache.nifi.controller.repository.WriteAheadFlowFileRepository.onGlobalSync(WriteAheadFlowFileRepository.java:287) 
at org.wali.MinimalLockingWriteAheadLog.checkpoint(MinimalLockingWriteAheadLog.java:565) 
- waiting on org.wali.MinimalLockingWriteAheadLog@65ab87e4 
at org.apache.nifi.controller.repository.WriteAheadFlowFileRepository.checkpoint(WriteAheadFlowFileRepository.java:416) 
{code}



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