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https://issues.apache.org/jira/browse/HBASE-22079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HBASE-22079:
-------------------------------------
Attachment: HBASE-22079.patch
> master leaks ZK on shutdown and gets stuck because of netty threads if netty
> socket is used
> -------------------------------------------------------------------------------------------
>
> Key: HBASE-22079
> URL: https://issues.apache.org/jira/browse/HBASE-22079
> Project: HBase
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Major
> Attachments: HBASE-22079.patch
>
>
> {noformat}
> "master/...:17000:becomeActiveMaster-SendThread(...1)" #311 daemon prio=5
> os_prio=0 tid=0x0000000058c61800 nid=0x2dd0 waiting on condition
> [0x0000000c477fe000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000000c4a5b3c0> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
> at
> java.util.concurrent.LinkedBlockingDeque.pollFirst(LinkedBlockingDeque.java:522)
> at
> java.util.concurrent.LinkedBlockingDeque.poll(LinkedBlockingDeque.java:684)
> at
> org.apache.zookeeper.ClientCnxnSocketNetty.doTransport(ClientCnxnSocketNetty.java:232)
> at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1146)
> {noformat}
> This causes a bunch of netty threads to also leak it looks like, and these
> are not daemon (by design, apparently)
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