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https://issues.apache.org/jira/browse/HBASE-10355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13906488#comment-13906488
]
Enis Soztutar commented on HBASE-10355:
---------------------------------------
While testing this (v1 patch) with HBASE-10572, I noticed some of the reader
threads are stuck in:
{code}
"TimeBoundedMultiThreadedReaderThread_13" prio=10 tid=0x00007fafd02ed000
nid=0x4a3e waiting on condition [0x00007fafc1799000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000bd6d2520> (a
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at
java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
at
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
at
java.util.concurrent.ExecutorCompletionService.take(ExecutorCompletionService.java:193)
at
org.apache.hadoop.hbase.client.RpcRetryingCallerWithFallBack.call(RpcRetryingCallerWithFallBack.java:183)
- locked <0x00000000bd6d25c0> (a
org.apache.hadoop.hbase.client.RpcRetryingCallerWithFallBack)
at org.apache.hadoop.hbase.client.HTable.get(HTable.java:821)
at
org.apache.hadoop.hbase.util.MultiThreadedReader$HBaseReaderThread.queryKey(MultiThreadedReader.java:286)
at
org.apache.hadoop.hbase.util.MultiThreadedReader$HBaseReaderThread.readKey(MultiThreadedReader.java:247)
at
org.apache.hadoop.hbase.util.MultiThreadedReader$HBaseReaderThread.runReader(MultiThreadedReader.java:190)
at
org.apache.hadoop.hbase.util.MultiThreadedReader$HBaseReaderThread.run(MultiThreadedReader.java:148)
{code}
I am still looking into the root cause, but just wanted to give a heads up.
Maybe the CompletionService in v2 solves this, but have not checked it yet.
> Failover RPC's from client using region replicas
> ------------------------------------------------
>
> Key: HBASE-10355
> URL: https://issues.apache.org/jira/browse/HBASE-10355
> Project: HBase
> Issue Type: Sub-task
> Components: Client
> Reporter: Enis Soztutar
> Assignee: Nicolas Liochon
> Fix For: 0.99.0
>
> Attachments: 10355.v1.patch, 10355.v2.patch
>
>
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