[ https://issues.apache.org/jira/browse/HADOOP-8220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Todd Lipcon updated HADOOP-8220:
--------------------------------
Target Version/s: 0.23.3, 0.24.0 (was: 0.24.0, 0.23.3)
Status: Patch Available (was: Open)
> ZKFailoverController doesn't handle failure to become active correctly
> ----------------------------------------------------------------------
>
> Key: HADOOP-8220
> URL: https://issues.apache.org/jira/browse/HADOOP-8220
> Project: Hadoop Common
> Issue Type: Bug
> Components: ha
> Affects Versions: 0.23.3, 0.24.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Attachments: hadoop-8220.txt
>
>
> The ZKFC doesn't properly handle the case where the monitored service fails to become
active. Currently, it catches the exception and logs a warning, but then continues on, after
calling quitElection(). This causes a NPE when it later tries to use the same zkClient instance
while handling that same request. There is a test case, but the test case doesn't ensure that
the node that had the failure is later able to recover properly.
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