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https://issues.apache.org/jira/browse/PIG-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashutosh Chauhan updated PIG-1131:
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Attachment: pig-1131.patch
In POLocalRearrange number of elements in tuple not present in key (and thus
put in value) is computed first time and then cached as an optimization. This
patch removes this caching because of the problem illustrated in the bug. Test
case included which reproduces the bug.
> Pig simple join does not work when it contains empty lines
> ----------------------------------------------------------
>
> Key: PIG-1131
> URL: https://issues.apache.org/jira/browse/PIG-1131
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Viraj Bhat
> Assignee: Ashutosh Chauhan
> Fix For: 0.7.0
>
> Attachments: junk1.txt, junk2.txt, pig-1131.patch,
> simplejoinscript.pig
>
>
> I have a simple script, which does a JOIN.
> {code}
> input1 = load '/user/viraj/junk1.txt' using PigStorage(' ');
> describe input1;
> input2 = load '/user/viraj/junk2.txt' using PigStorage('\u0001');
> describe input2;
> joineddata = JOIN input1 by $0, input2 by $0;
> describe joineddata;
> store joineddata into 'result';
> {code}
> The input data contains empty lines.
> The join fails in the Map phase with the following error in the
> PRLocalRearrange.java
> java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
> at java.util.ArrayList.RangeCheck(ArrayList.java:547)
> at java.util.ArrayList.get(ArrayList.java:322)
> at org.apache.pig.data.DefaultTuple.get(DefaultTuple.java:143)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.constructLROutput(POLocalRearrange.java:464)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNext(POLocalRearrange.java:360)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POUnion.getNext(POUnion.java:162)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:253)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:244)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.map(PigMapReduce.java:94)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
> at org.apache.hadoop.mapred.Child.main(Child.java:159)
> I am surprised that the test cases did not detect this error. Could we add
> this data which contains empty lines to the testcases?
> Viraj
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