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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (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 20:43:15 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13962228#comment-13962228
] 

Hadoop QA commented on HDFS-6197:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12639026/HDFS-6197.1.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.TestDistributedFileSystem
                  org.apache.hadoop.hdfs.server.balancer.TestBalancerWithNodeGroup

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/6603//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/6603//console

This message is automatically generated.

> 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
>         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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