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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3884) QJM: Journal format() should reset cached values
Date Sat, 01 Sep 2012 07:36:07 GMT
Todd Lipcon created HDFS-3884:
---------------------------------

             Summary: QJM: Journal format() should reset cached values
                 Key: HDFS-3884
                 URL: https://issues.apache.org/jira/browse/HDFS-3884
             Project: Hadoop HDFS
          Issue Type: Sub-task
    Affects Versions: QuorumJournalManager (HDFS-3077)
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
             Fix For: QuorumJournalManager (HDFS-3077)
         Attachments: hdfs-3884.txt

Simple bug in the JournalNode: it caches certain values (eg accepted epoch) in memory, and
the cached values aren't reset when the journal is formatted. So, after a format, further
calls to the same Journal will see the old value for accepted epoch, writer epoch, etc, preventing
the journal from being re-used until the JN is restarted.

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