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https://issues.apache.org/jira/browse/MAPREDUCE-1423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833373#action_12833373
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Hadoop QA commented on MAPREDUCE-1423:
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-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12435766/CombineFileInputFormatPerformance.txt
against trunk revision 909340.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+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 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed core unit tests.
-1 contrib tests. The patch failed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/450/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/450/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/450/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/450/console
This message is automatically generated.
> Improve performance of CombineFileInputFormat when multiple pools are
> configured
> --------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1423
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1423
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: CombineFileInputFormatPerformance.txt,
> CombineFileInputFormatPerformance.txt
>
>
> I have a map-reduce job that is using CombineFileInputFormat. It has
> configured 10000 pools and 30000 files. The time to create the splits takes
> more than an hour. The reaosn being that CombineFileInputFormat.getSplits()
> converts the same path from String to Path object multiple times, one for
> each instance of a pool. Similarly, it calls Path.toUri(0 multiple times.
> This code can be optimized.
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