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Hudson commented on HBASE-8539: ------------------------------- Integrated in HBase-0.94-security #141 (See [https://builds.apache.org/job/HBase-0.94-security/141/]) HBASE-8539 Double(or tripple ...) ZooKeeper listeners of the same type when Master recovers from ZK SessionExpiredException (Revision 1482671) Result = FAILURE stack : Files : * /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/master/HMaster.java * /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWatcher.java * /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/master/TestMasterZKSessionRecovery.java > Double(or tripple ...) ZooKeeper listeners of the same type when Master > recovers from ZK SessionExpiredException > ---------------------------------------------------------------------------------------------------------------- > > Key: HBASE-8539 > URL: https://issues.apache.org/jira/browse/HBASE-8539 > Project: HBase > Issue Type: Bug > Components: master > Affects Versions: 0.98.0, 0.94.7, 0.95.0 > Reporter: Jeffrey Zhong > Assignee: Jeffrey Zhong > Fix For: 0.98.0, 0.94.8, 0.95.1 > > Attachments: double-registered listeners.png, hbase-8539-0.94.patch, > hbase-8539.patch, hbase-8539.patch > > > When Master tries to recover from zookeeper session expired exceptions, we > don't clean old registered listener instances. Therefore, it may end up we > have two(or more) listeners to double handling same events. Attached a screen > shot from debugger to show the issue. > I considered to limit one listener per class while I think that would limit > the listener usage so I choose to clear exiting listeners during recovery for > the fix. > (This issue is unrelated to the issue HBASE-8365 because I verified there is > no dup-listeners when HBASE-8365 happened) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira