hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8539) Double(or tripple ...) ZooKeeper listeners of the same type when Master recovers from ZK SessionExpiredException
Date Mon, 13 May 2013 21:19:17 GMT
Jeffrey Zhong created HBASE-8539:
------------------------------------

             Summary: 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: 0.95.0, 0.94.7, 0.98.0
            Reporter: Jeffrey Zhong
            Assignee: Jeffrey Zhong


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

Mime
View raw message