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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5491) DFSIO do not initialize write buffer correctly
Date Tue, 03 Sep 2013 04:37:52 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13756358#comment-13756358
] 

Hadoop QA commented on MAPREDUCE-5491:
--------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12601102/MAPREDUCE-5491.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 2 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}.  The javadoc tool did not generate any 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 following test timeouts occurred in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient:

org.apache.hadoop.mapreduce.v2.TestUberAM

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3976//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3976//console

This message is automatically generated.
                
> DFSIO do not initialize write buffer correctly
> ----------------------------------------------
>
>                 Key: MAPREDUCE-5491
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5491
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: benchmarks, test
>    Affects Versions: trunk
>            Reporter: Raymond Liu
>            Assignee: Raymond Liu
>         Attachments: MAPREDUCE-5491.patch
>
>
> In DFSIO test, the IOMapperBase will set bufferSize in configure method, while writeMapper,
appendMapper etc use bufferSize to initialize buffer in the constructor. This will lead to
buffer not initialized at all. It is ok for non compression route, while compression is used,
the output data size will be very small due to all 0 in buffer.
> Thus, the overrided configure method should be be the correct place for initial buffer

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