[jira] [Created] (HBASE-22079) master leaks ZK on shutdown and gets stuck because of netty threads if netty socket is used

[Sergey Shelukhin (JIRA)]

Sergey Shelukhin created HBASE-22079:
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             Summary: 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


{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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