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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5728) FSEditLog.printStatistics may cause IndexOutOfBoundsException
Date Sat, 25 Apr 2009 13:58:30 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12702701#action_12702701

Hadoop QA commented on HADOOP-5728:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 768376.

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    +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 warnings.

    +1 Eclipse classpath. The patch retains Eclipse classpath integrity.

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

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

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

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/241/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/241/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/241/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-vesta.apache.org/241/console

This message is automatically generated.

> FSEditLog.printStatistics may cause IndexOutOfBoundsException
> -------------------------------------------------------------
>                 Key: HADOOP-5728
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5728
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.19.1
>         Environment: jdk 1.6, centOS 5.2 and hadoop 0.19.1
>            Reporter: Wang Xu
>            Assignee: Wang Xu
>             Fix For: 0.19.2
>         Attachments: editlog-printstatistics.patch
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
> We met IndexOutOfBoundsException exception when did logSync or rollEditlog,
> the direct reason is the printStatistics of FSEditLog used the first element of
>  StringArray editStreams, but does not check whether editStreams is empty when 
> it is not null.  As below:
>     if (editStreams == null ) {
>       return;
>     }
>     .....[snipped]....
>     buf.append(" Number of syncs: " + editStreams.get(0).getNumSync());
> the simple solution is to check whether it is empty.

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