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https://issues.apache.org/jira/browse/PIG-4112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cheolsoo Park resolved PIG-4112.
--------------------------------
Resolution: Fixed
Committed to trunk. Thank you Rohini!
> NPE in packager when union + group-by followed by replicated join in Tez
> ------------------------------------------------------------------------
>
> Key: PIG-4112
> URL: https://issues.apache.org/jira/browse/PIG-4112
> Project: Pig
> Issue Type: Sub-task
> Components: tez
> Reporter: Cheolsoo Park
> Assignee: Rohini Palaniswamy
> Fix For: 0.14.0
>
> Attachments: PIG-4112-1.patch
>
>
> To reproduce the error, run the following query-
> {code}
> A = load 'foo' as (id:int, fruit);
> B = load 'foo' as (id:int, fruit);
> C = union A, B;
> D = group C by id;
> E = load 'foo' as (id:int, fruit);
> F = join D by group, E by id using 'replicated';
> dump F;
> {code}
> Here is the stack trace-
> {code}
> Error: Failure while running task:java.lang.NullPointerException
> : at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.Packager.getValueTuple(Packager.java:215)
> : at
> org.apache.pig.backend.hadoop.executionengine.tez.POShuffleTezLoad.getNextTuple(POShuffleTezLoad.java:179)
> : at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:301)
> : at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POFRJoin.getNextTuple(POFRJoin.java:270)
> : at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:301)
> : at
> org.apache.pig.backend.hadoop.executionengine.tez.POStoreTez.getNextTuple(POStoreTez.java:113)
> : at
> org.apache.pig.backend.hadoop.executionengine.tez.PigProcessor.runPipeline(PigProcessor.java:317)
> : at
> org.apache.pig.backend.hadoop.executionengine.tez.PigProcessor.run(PigProcessor.java:196)
> : at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:324)
> : at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:180)
> : at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:172)
> : at java.security.AccessController.doPrivileged(Native Method)
> : at javax.security.auth.Subject.doAs(Subject.java:415)
> : at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
> : at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.call(TezTaskRunner.java:172)
> : at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.call(TezTaskRunner.java:167)
> : at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> : at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> : at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> : at java.lang.Thread.run(Thread.java:744)
> {code}
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