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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2013/10/01 19:39:24 UTC

[jira] [Created] (HDFS-5287) JN need not validate finalized log segments in newEpoch

Todd Lipcon created HDFS-5287:
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             Summary: JN need not validate finalized log segments in newEpoch
                 Key: HDFS-5287
                 URL: https://issues.apache.org/jira/browse/HDFS-5287
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: qjm
    Affects Versions: 2.1.1-beta
            Reporter: Todd Lipcon
            Priority: Minor


In {{scanStorageForLatestEdits}}, the JN will call {{validateLog}} on the last log segment, regardless of whether it is finalized. If it's finalized, then this is a needless pass over the logs which can adversely affect failover time for a graceful failover.



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