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https://issues.apache.org/jira/browse/MAPREDUCE-3992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13233764#comment-13233764
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Hudson commented on MAPREDUCE-3992:
-----------------------------------
Integrated in Hadoop-Mapreduce-0.23-Build #231 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-0.23-Build/231/])
MAPREDUCE-3992. Reduce fetcher doesn't verify HTTP status code of response.
Contributed by Todd Lipcon. (Revision 1302755)
Result = FAILURE
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1302755
Files :
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/Fetcher.java
> Reduce fetcher doesn't verify HTTP status code of response
> ----------------------------------------------------------
>
> Key: MAPREDUCE-3992
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3992
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv1
> Affects Versions: 0.23.1, 0.24.0, 1.0.1
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.24.0, 0.23.3
>
> Attachments: mr-3992-branch-1.txt, mr-3992.txt
>
>
> Currently, the reduce fetch code doesn't check the HTTP status code of the
> response. This can lead to the following situation:
> - the map output servlet gets an IOException after setting the headers but
> before the first call to flush()
> - this causes it to send a response with a non-OK result code, including the
> exception text as the response body (response.sendError() does this if the
> response isn't committed)
> - it will still include the response headers indicating it's a valid response
> In the case of a merge-to-memory, the compression codec might then try to
> interpret the HTML response as compressed data, resulting in either a huge
> allocation (OOME) or some other nasty error. This bug seems to be present in
> MR1, but haven't checked trunk/MR2 yet.
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