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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-894) order-by fails when input is empty
Date Fri, 09 Oct 2009 02:09:31 GMT

    [ https://issues.apache.org/jira/browse/PIG-894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12763786#action_12763786
] 

Hadoop QA commented on PIG-894:
-------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12421681/PIG-894-1.patch
  against trunk revision 823257.

    +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 passed core unit tests.

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

Test results: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/16/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/16/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: http://hudson.zones.apache.org/hudson/job/Pig-Patch-h8.grid.sp2.yahoo.net/16/console

This message is automatically generated.

> order-by fails when input is empty
> ----------------------------------
>
>                 Key: PIG-894
>                 URL: https://issues.apache.org/jira/browse/PIG-894
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.4.0
>            Reporter: Thejas M Nair
>            Assignee: Daniel Dai
>             Fix For: 0.6.0
>
>         Attachments: PIG-894-1.patch, PIG-894-2.patch
>
>
> grunt> l = load 'students.txt' ;
> grunt> f = filter l by 1 == 2;
> grunt> o = order f by $0 ;
> grunt> dump o;
> This results in 3 MR jobs . The 2nd (sampling) MR creates empty sample file, and 3rd
MR (order-by) fails with following error in Map job -
> java.lang.RuntimeException: java.lang.RuntimeException: Empty samples file
> 	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.partitioners.WeightedRangePartitioner.configure(WeightedRangePartitioner.java:104)
> 	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58)
> 	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:82)
> 	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.(MapTask.java:348)
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:193)
> 	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2207)
> Caused by: java.lang.RuntimeException: Empty samples file
> 	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.partitioners.WeightedRangePartitioner.configure(WeightedRangePartitioner.java:89)
> 	... 5 more

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