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https://issues.apache.org/jira/browse/HBASE-29256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17943987#comment-17943987
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Viraj Jasani commented on HBASE-29256:
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Yes, this is same case as HBASE-29251, continuing discussion there.
> Multiple Split Procedures on same region stuck indefinitely waiting for
> Exclusive Lock
> --------------------------------------------------------------------------------------
>
> Key: HBASE-29256
> URL: https://issues.apache.org/jira/browse/HBASE-29256
> Project: HBase
> Issue Type: Improvement
> Reporter: Prathyusha
> Priority: Major
>
> Multiple Split Procedures on same region got stuck indefinitely waiting for
> Exclusive Lock help by the first Split Procedure created on the region and
> that procedure wasnt scheduled for almost a week till HMaster restart
> happened.
> First SplitProcedure created failed to update procedure store
> {color:#4c9aff}_ERROR [PEWorker-25] region.RegionProcedureStore - Failed to
> update proc pid=966118, state=RUNNABLE:SPLIT_TABLE_REGION_PREPARE,
> locked=true; SplitTableRegionProcedure table=_tablename_,
> parent=_parent-XXX_, daughterA=_daughter1-xxx_, daughterB=_daughter2-xxx_
> java.io.InterruptedIOException: No ack received after 25s and a timeout of
> 25s at
> org.apache.hadoop.hdfs.DataStreamer.waitForAckedSeqno(DataStreamer.java:938)
> at
> org.apache.hadoop.hdfs.DFSOutputStream.flushOrSync(DFSOutputStream.java:692)
> at
> org.apache.hadoop.hdfs.DFSOutputStream.hflush(DFSOutputStream.java:580)_{color}
> All the rest of the SplitProcedures were waiting on the Exclusive lock held
> by above pid, and the first one never got rescheduled till a HMaster restart.
> {color:#4c9aff}_assignment.SplitTableRegionProcedure - LOCK_EVENT_WAIT
> serverLocks={}, namespaceLocks={{default=exclusiveLockOwner=NONE,
> sharedLockCount=1, waitingProcCount=0}},
> tableLocks={{tsdb=exclusiveLockOwner=NONE, sharedLockCount=1,
> waitingProcCount=0}}, regionLocks={{parent-XXX=exclusiveLockOwner=966118,
> sharedLockCount=0, waitingProcCount=8043}}, peerLocks={}, metaLocks={}_{color}
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