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https://issues.apache.org/jira/browse/PIG-5104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860903#comment-15860903
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liyunzhang_intel commented on PIG-5104:
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[~nkollar]: thanks for your patience. sorry to late reply.
here my understanding to this jira is
1. ParallelismSetter#visitSparkOp fails to execute
"jobConf.set(PigImplConstants.PIG_CROSS_PARALLELISM + "." + key,
Integer.toString(96)))" because sparkOperator missed some crossKey
2. the reason why sparkOperator missed some crossKey is because we don't add
crossKey of previous sparkOperator in SparkCompiler#merge
more detail see PIG-5104.zly.patch. Not have time to full test the patch.
> Union_15 e2e test failing on Spark
> ----------------------------------
>
> Key: PIG-5104
> URL: https://issues.apache.org/jira/browse/PIG-5104
> Project: Pig
> Issue Type: Bug
> Components: spark
> Reporter: Nandor Kollar
> Assignee: Nandor Kollar
> Fix For: spark-branch
>
> Attachments: PIG-5104.patch, TestUnion_15.java
>
>
> While working on PIG-4891 I noticed that Union_15 e2e test is failing on
> Spark mode with this exception:
> Caused by: java.lang.RuntimeException:
> org.apache.pig.backend.executionengine.ExecException: ERROR 2078: Caught
> error from UDF: org.apache.pig.impl.builtin.GFCross [Unable to get
> parallelism hint from job conf]
> at
> org.apache.pig.backend.hadoop.executionengine.spark.converter.OutputConsumerIterator.readNext(OutputConsumerIterator.java:89)
> at
> org.apache.pig.backend.hadoop.executionengine.spark.converter.OutputConsumerIterator.hasNext(OutputConsumerIterator.java:96)
> at
> scala.collection.convert.Wrappers$JIteratorWrapper.hasNext(Wrappers.scala:42)
> at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:369)
> at
> org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:126)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
> at org.apache.spark.scheduler.Task.run(Task.scala:89)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 2078:
> Caught error from UDF: org.apache.pig.impl.builtin.GFCross [Unable to get
> parallelism hint from job conf]
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:358)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNextDataBag(POUserFunc.java:374)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:335)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:404)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNextTuple(POForEach.java:321)
> at
> org.apache.pig.backend.hadoop.executionengine.spark.converter.ForEachConverter$ForEachFunction$1$1.getNextResult(ForEachConverter.java:87)
> at
> org.apache.pig.backend.hadoop.executionengine.spark.converter.OutputConsumerIterator.readNext(OutputConsumerIterator.java:69)
> ... 11 more
> Caused by: java.io.IOException: Unable to get parallelism hint from job conf
> at org.apache.pig.impl.builtin.GFCross.exec(GFCross.java:66)
> at org.apache.pig.impl.builtin.GFCross.exec(GFCross.java:37)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:330)
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