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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6197) Rolling upgrade rollback on Windows can fail attempting to rename edit log segment files to a destination that already exists.
Date Mon, 07 Apr 2014 17:53:16 GMT
Chris Nauroth created HDFS-6197:
-----------------------------------

             Summary: Rolling upgrade rollback on Windows can fail attempting to rename edit
log segment files to a destination that already exists.
                 Key: HDFS-6197
                 URL: https://issues.apache.org/jira/browse/HDFS-6197
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 3.0.0, 2.4.0
            Reporter: Chris Nauroth
            Assignee: Chris Nauroth
            Priority: Minor


As part of a rollback from a rolling upgrade in progress, we discard edit log segments by
renaming the file with suffix ".trash".  If no new edits arrive in between multiple attempts,
then the ".trash" file may still exist.  On Windows, {{java.io.File#renameTo}} fails if the
destination already exists though.  This is visible right now as a failure in {{TestRollingUpgrade#testRollback}}
when running on Windows.



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