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https://issues.apache.org/jira/browse/PIG-846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719075#action_12719075
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Hadoop QA commented on PIG-846:
-------------------------------
+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12410528/PIG-846-v2.patch
against trunk revision 783955.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 18 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-minerva.apache.org/79/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-minerva.apache.org/79/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
http://hudson.zones.apache.org/hudson/job/Pig-Patch-minerva.apache.org/79/console
This message is automatically generated.
> MultiQuery optimization in some cases has an issue when there is a split in
> the map plan
> -----------------------------------------------------------------------------------------
>
> Key: PIG-846
> URL: https://issues.apache.org/jira/browse/PIG-846
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.2.1
> Reporter: Pradeep Kamath
> Assignee: Pradeep Kamath
> Fix For: 0.3.0
>
> Attachments: PIG-846-v2.patch, PIG-846.patch
>
>
> The following script produces the error that follows:
> {noformat}
> A = LOAD 'input.txt' as (f0, f1, f2, f3, f4, f5, f6, f7, f8);
> B = FOREACH A GENERATE f0, f1, f2, f3, f4;
> B1 = foreach B generate f0, f1, f2;
> C = GROUP B1 BY (f1, f2);
> STORE C into 'foo1';
> B2 = FOREACH B GENERATE f0, f3, f4;
> E = GROUP B2 BY (f3, f4);
> STORE E into 'foo2';
> F = FOREACH A GENERATE f0, f5, f6, f7, f8;
> F1 = FOREACH F GENERATE f0, f5,f6;
> G = GROUP F1 BY (f5, f6);
> STORE G into 'foo3';
> F2 = FOREACH F GENERATE f0, f7, f8;
> I = GROUP F2 BY (f7, f8);
> STORE I into 'foo4';
> {noformat}
> Exception encountered during execution:
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPackage.getValueTuple(POPackage.java:262)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPackage.getNext(POPackage.java:209)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMultiQueryPackage.getNext(POMultiQueryPackage.java:186)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMultiQueryPackage.getNext(POMultiQueryPackage.java:186)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.processOnePackageOutput(PigMapReduce.java:277)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:268)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:142)
> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:318)
> at
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2207)
> {noformat}
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