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From "Chia-Ping Tsai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-19870) Fix the NEP in ReadOnlyZKClient#run
Date Fri, 26 Jan 2018 18:36:00 GMT
Chia-Ping Tsai created HBASE-19870:

             Summary: Fix the NEP in ReadOnlyZKClient#run
                 Key: HBASE-19870
                 URL: https://issues.apache.org/jira/browse/HBASE-19870
             Project: HBase
          Issue Type: Sub-task
            Reporter: Chia-Ping Tsai
            Assignee: Chia-Ping Tsai

I notice a NPE from my jenkins.
2018-01-26 17:26:41,078 DEBUG [M:0;8546d406e429:40557-EventThread] zookeeper.ZKWatcher(443):
replicationLogCleaner-0x161337ddc090004, quorum=localhost:56060, baseZNode=/hbase Received
ZooKeeper Event, type=None, state=Disconnected, path=null
	at org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient.run(ReadOnlyZKClient.java:322)
	at java.lang.Thread.run(Thread.java:748)
If any zk task invokes the #onComplete late, the count of current requests will not zero and
then the null from task queue will destroy the work thread in ReadOnlyZKClient.

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