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https://issues.apache.org/jira/browse/HDFS-6197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13962290#comment-13962290
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Hudson commented on HDFS-6197:
------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #5465 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/5465/])
HDFS-6197. Rolling upgrade rollback on Windows can fail attempting to rename
edit log segment files to a destination that already exists. Contributed by
Chris Nauroth. (cnauroth:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1585586)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FileJournalManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestRollingUpgrade.java
> 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
> Fix For: 3.0.0, 2.4.1
>
> Attachments: HDFS-6197.1.patch
>
>
> 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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