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Posted to hdfs-dev@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2014/06/16 22:56:01 UTC

[jira] [Created] (HDFS-6545) Finalizing rolling upgrade can make NN unavailable for a long duration

Kihwal Lee created HDFS-6545:
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             Summary: Finalizing rolling upgrade can make NN unavailable for a long duration
                 Key: HDFS-6545
                 URL: https://issues.apache.org/jira/browse/HDFS-6545
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 2.4.0
            Reporter: Kihwal Lee
            Priority: Critical


In {{FSNamesystem#finalizeRollingUpgrade()}}, {{saveNamespace()}} is directly called.  For name nodes with a big name space, it can take minutes to save a new fsimage.




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