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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (Created) (JIRA)" <ji...@apache.org> on 2012/03/27 06:30:03 UTC

[jira] [Created] (HADOOP-8220) ZKFailoverController doesn't handle failure to become active correctly

ZKFailoverController doesn't handle failure to become active correctly
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                 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


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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