Chia-Ping Tsai created HBASE-19870:
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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.
{code}
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
java.lang.NullPointerException
at
org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient.run(ReadOnlyZKClient.java:322)
at java.lang.Thread.run(Thread.java:748)
{code}
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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