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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1904) ArrayIndexOutOfBoundException in BlocksMap
Date Wed, 19 Sep 2007 06:13:43 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12528670

Hadoop QA commented on HADOOP-1904:

+1 overall.  Here are the results of testing the latest attachment 
against trunk revision r577010.

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

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

    javac +1.  The applied patch does not generate any new compiler warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

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

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

Test results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/787/testReport/
Findbugs warnings: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/787/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/787/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/787/console

This message is automatically generated.

> ArrayIndexOutOfBoundException in BlocksMap
> ------------------------------------------
>                 Key: HADOOP-1904
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1904
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.15.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>            Priority: Blocker
>             Fix For: 0.15.0
>         Attachments: RedundantAddBlock.patch
> If the name-node receives a duplicate report of a written block from a data-node it does
not insert
> the block into the block map but mistakenly inserts it into the list of blocks belonging
to the data-node,
> placing it into the beginning of the list. Since the block is not removed from the list
prior to the insertion,
> the list itself becomes corrupted.
> This patch fixes the problem. I also reorganized the add/removeNode and add/removeBlock
> in order to avoid similar bugs in the future.

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