Cheolsoo Park created PIG-4112:
----------------------------------
Summary: 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: Cheolsoo Park
Fix For: 0.14.0
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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