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Date: Tue, 26 Jul 2011 18:55:10 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-1981) When namenode goes down while
 checkpointing and if is started again subsequent Checkpointing is always
 failing
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    [ https://issues.apache.org/jira/browse/HDFS-1981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13071279#comment-13071279 ] 

Hadoop QA commented on HDFS-1981:
---------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12487871/HDFS-1981_0.23.patch
  against trunk revision 1150960.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 4 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

    +1 system test framework.  The patch passed system test framework compile.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/1024//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HDFS-Build/1024//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/1024//console

This message is automatically generated.

> When namenode goes down while checkpointing and if is started again subsequent Checkpointing is always failing
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1981
>                 URL: https://issues.apache.org/jira/browse/HDFS-1981
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.22.0
>         Environment: Linux
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: Uma Maheswara Rao G
>            Priority: Blocker
>             Fix For: 0.22.0
>
>         Attachments: HDFS-1981-1.patch, HDFS-1981-2.patch, HDFS-1981.patch, HDFS-1981_0.23.patch
>
>
> This scenario is applicable in NN and BNN case.
> When the namenode goes down after creating the edits.new, on subsequent restart the divertFileStreams will not happen to edits.new as the edits.new file is already present and the size is zero.
> so on trying to saveCheckPoint an exception occurs 
> 2011-05-23 16:38:57,476 WARN org.mortbay.log: /getimage: java.io.IOException: GetImage failed. java.io.IOException: Namenode has an edit log with timestamp of 2011-05-23 16:38:56 but new checkpoint was created using editlog  with timestamp 2011-05-23 16:37:30. Checkpoint Aborted.
> This is a bug or is that the behaviour.

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