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From "Bikas Saha (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2915) HA: TestFailureOfSharedDir.testFailureOfSharedDir() has race condition
Date Wed, 08 Feb 2012 08:42:57 GMT
HA: TestFailureOfSharedDir.testFailureOfSharedDir() has race condition
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                 Key: HDFS-2915
                 URL: https://issues.apache.org/jira/browse/HDFS-2915
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: name-node
    Affects Versions: HA branch (HDFS-1623)
            Reporter: Bikas Saha
            Assignee: Bikas Saha
            Priority: Minor


The test deletes the shared edits dir to simulate a failure. Then it calls rollEditLogs()
to trigger the deleted dir to be used and fail with an IOException. Unfortunately, deleting
the shared dir can put the NN in safe mode due to lack of space. This causes a SafeModeException
to be thrown when rollEditDirs() is called. This exception is caught as an IOException in
the test but the associated assert in the catch block fails.

This always happens in the debugger because the delay in stepping through causes the safe
mode change to happen before rollEditLogs() gets called.

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