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https://issues.apache.org/jira/browse/PIG-5372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Koji Noguchi updated PIG-5372:
------------------------------
Attachment: pig-5372-v1.patch
Same would happen for SAMPLE since it internally calls RANDOM.
NPE happens atÂ
{code:java}
int jobidhash =
PigMapReduce.sJobConfInternal.get().get(MRConfiguration.JOB_ID).hashCode();
{code}
when job_id returns null.
This was happening when SkewedPartitioner.setConf was replacing a configuration
dropping the original one with necessary job info.
Attaching a patch({{pig-5372-v1.patch}}) that would just add instead of
replacing the conf.
> SAMPLE/RANDOM(udf) before skewed join failing with NPE
> ------------------------------------------------------
>
> Key: PIG-5372
> URL: https://issues.apache.org/jira/browse/PIG-5372
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.16.0
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Priority: Major
> Attachments: pig-5372-v1.patch
>
>
> Sample short code like below
> {code}
> A = LOAD 'input.txt' AS (a1:int, a2:chararray, a3:int);
> B = LOAD 'input.txt' AS (b1:int, b2:chararray, b3:int);
> A2 = FOREACH A generate *, RANDOM() as randnum;
> D = join A2 by a1, B by b1 using 'skewed' parallel 2;
> store D into '$output';
> {code}
> Fails with NPE.
> {noformat}
> 2018-12-12 16:06:04,860 [Dispatcher thread: Central] INFO
> org.apache.tez.dag.history.HistoryEventHandler -
> [HISTORY][DAG:dag_1544648742542_0001_1][Event:TASK_FINISHED]:
> vertexName=scope-55, taskId=task_1544648742542_0001_1_02_000000,
> startTime=1544648745036, finishTime=1544648764857, timeTaken=19821,
> status=KILLED, successfulAttemptID=null, diagnostics=TaskAttempt 0 failed,
> info=[Error: Failure while running
> task:org.apache.pig.backend.executionengine.ExecException: ERROR 0: Exception
> while executing (Name: Local Rearrange[tuple]{int}(false) - scope-29 ->
> scope-58 Operator Key: scope-29):
> org.apache.pig.backend.executionengine.ExecException: ERROR 0: Exception
> while executing [POUserFunc (Name:
> POUserFunc(org.apache.pig.builtin.RANDOM)[double] - scope-40 Operator Key:
> scope-40) children: null at []]: java.lang.NullPointerException
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:315)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNextTuple(POLocalRearrange.java:287)
> at
> org.apache.pig.backend.hadoop.executionengine.tez.plan.operator.POLocalRearrangeTez.getNextTuple(POLocalRearrangeTez.java:131)
> at
> org.apache.pig.backend.hadoop.executionengine.tez.runtime.PigProcessor.runPipeline(PigProcessor.java:420)
> at
> org.apache.pig.backend.hadoop.executionengine.tez.runtime.PigProcessor.run(PigProcessor.java:282)
> at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:337)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:179)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:171)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:171)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:167)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 0:
> Exception while executing [POUserFunc (Name:
> POUserFunc(org.apache.pig.builtin.RANDOM)[double] - scope-40 Operator Key:
> scope-40) children: null at []]: java.lang.NullPointerException
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:367)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:408)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNextTuple(POForEach.java:325)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:305)
> ... 17 more
> Caused by: java.lang.NullPointerException
> at org.apache.pig.builtin.RANDOM.exec(RANDOM.java:51)
> at org.apache.pig.builtin.RANDOM.exec(RANDOM.java:37)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:332)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNextDouble(POUserFunc.java:396)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:343)
> ... 20 more
> ]
> {noformat}
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