Koji Noguchi created PIG-5372:
---------------------------------
Summary: 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
Reporter: Koji Noguchi
Assignee: Koji Noguchi
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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