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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5918) LineRecordReader can return the same decompressor to CodecPool multiple times
Date Mon, 10 Nov 2014 09:22:34 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14204540#comment-14204540
] 

Hadoop QA commented on MAPREDUCE-5918:
--------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12660808/MAPREDUCE-5918.2.patch
  against trunk revision ab30d51.

    {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}.  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
2.0.3) warnings.

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

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core.

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5004//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5004//console

This message is automatically generated.

> LineRecordReader can return the same decompressor to CodecPool multiple times
> -----------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5918
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5918
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.3.0
>            Reporter: Sergey Murylev
>            Assignee: Sergey Murylev
>             Fix For: trunk
>
>         Attachments: MAPREDUCE-5918.1.patch, MAPREDUCE-5918.2.patch
>
>
> LineRecordReader can return the same decompressor to CodecPool multiple times if method
close() called multiple times. In this case CodecPool doesn't guarantee that it always return
different decompressors. This issue can cause some difficult reproducible and difficult diagnosable
bugs in Hadoop based programs. 



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