Got NullPointerException merge join with pruning
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Key: PIG-1142
URL: https://issues.apache.org/jira/browse/PIG-1142
Project: Pig
Issue Type: Bug
Affects Versions: 0.6.0
Reporter: Jing Huang
Fix For: 0.7.0
Here is my pig script:
register $zebraJar;
--fs -rmr $outputDir
a1 = LOAD '$inputDir/small1' USING
org.apache.hadoop.zebra.pig.TableLoader('count,seed,int1,str2');
a2 = LOAD '$inputDir/small2' USING
org.apache.hadoop.zebra.pig.TableLoader('count,seed,int1,str2');
sort1 = order a1 by str2;
sort2 = order a2 by str2;
--store sort1 into '$outputDir/smallsorted11' using
org.apache.hadoop.zebra.pig.TableStorer('[count,seed,int1,str2]');
--store sort2 into '$outputDir/smallsorted21' using
org.apache.hadoop.zebra.pig.TableStorer('[count,seed,int1,str2]');
rec1 = load '$outputDir/smallsorted11' using
org.apache.hadoop.zebra.pig.TableLoader();
rec2 = load '$outputDir/smallsorted21' using
org.apache.hadoop.zebra.pig.TableLoader();
joina = join rec1 by str2, rec2 by str2 using "merge" ;
E = foreach joina generate $0 as count, $1 as seed, $2 as int1, $3 as str2;
--limitedVals = LIMIT E 5;
--dump limitedVals;
store E into '$outputDir/smalljoin2' using
org.apache.hadoop.zebra.pig.TableStorer('');
============
Here is the stacktrace:
java.lang.NullPointerException at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNext(POLocalRearrange.java:312)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMergeJoin.extractKeysFromTuple(POMergeJoin.java:464)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POMergeJoin.getNext(POMergeJoin.java:341)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:260)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:237)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:253)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.close(PigMapBase.java:107)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:57) 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)
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