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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4300) TransferFsImage.downloadEditsToStorage should use a tmp file for destination
Date Tue, 11 Dec 2012 19:05:22 GMT
Todd Lipcon created HDFS-4300:
---------------------------------

             Summary: TransferFsImage.downloadEditsToStorage should use a tmp file for destination
                 Key: HDFS-4300
                 URL: https://issues.apache.org/jira/browse/HDFS-4300
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.0.2-alpha
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Critical


Currently, in TransferFsImage.downloadEditsToStorage, we download the edits file directly
to its finalized path. So, if the transfer fails in the middle, a half-written file is left
and cannot be distinguished from a correct file. So, future checkpoints by the 2NN will fail,
since the file is truncated in the middle -- but it won't ever download a good copy because
it thinks it already has the proper file.

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