[jira] [Created] (PIG-4936) Fix NPE exception in TestCustomPartitioner#testCustomPartitionerParseJoins

["liyunzhang_intel (JIRA)" <ji...@apache.org>]

liyunzhang_intel created PIG-4936:
-------------------------------------

             Summary: Fix NPE exception in TestCustomPartitioner#testCustomPartitionerParseJoins
                 Key: PIG-4936
                 URL: https://issues.apache.org/jira/browse/PIG-4936
             Project: Pig
          Issue Type: Bug
            Reporter: liyunzhang_intel
            Assignee: liyunzhang_intel


After PIG-4919(upgrade spark to 1.6.1 version), TestCustomPartitioner#TestCustomPartitioner fails.
{code}
Testcase: testCustomPartitionerParseJoins took 1.66 sec
        Caused an ERROR
Unable to open iterator for alias hash. Backend error : Job aborted due to stage failure: Task 0 in stage 2.0 failed 1 times, most recent failure: Lost task 0.0 in stage 2.0 (TID 3, localhost): java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at org.apache.pig.backend.hadoop.executionengine.spark.MapReducePartitionerWrapper.getPartition(MapReducePartitionerWrapper.java:118)
        at org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:151)
        at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73)
        at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
        at org.apache.spark.scheduler.Task.run(Task.scala:89)
        at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.pig.backend.hadoop.executionengine.spark.MapReducePartitionerWrapper.getPartition(MapReducePartitionerWrapper.java:110)
        ... 8 more 
Caused by: java.lang.NullPointerException
        at org.apache.pig.impl.io.PigNullableWritable.hashCode(PigNullableWritable.java:185)
        at org.apache.pig.test.utils.SimpleCustomPartitioner.getPartition(SimpleCustomPartitioner.java:33)
        ... 13 more
{code}



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