Nithin Asokan created CRUNCH-568:
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Summary: Aggregators fails on SparkPipeline
Key: CRUNCH-568
URL: https://issues.apache.org/jira/browse/CRUNCH-568
Project: Crunch
Issue Type: Bug
Components: Spark
Affects Versions: 0.12.0
Reporter: Nithin Asokan
Logging this based on mailing list discussion
http://mail-archives.apache.org/mod_mbox/crunch-user/201510.mbox/%3CCANb5z2KBqxZng92ToFo0MdTk2fd8jtGTjZ85h1yUo_akaetcXg%40mail.gmail.com%3E
Running a Crunch SparkPipeline with FirstN aggregator results in a
NullPointerException.
Example to recreate this
https://gist.github.com/nasokan/853ff80ce20ad7a78886
Stack trace on driver logs.
{code}
15/10/05 16:02:33 WARN TaskSetManager: Lost task 3.0 in stage 0.0 (TID 0,
123.domain.xyz): java.lang.NullPointerException
at
org.apache.crunch.impl.mr.run.UniformHashPartitioner.getPartition(UniformHashPartitioner.java:32)
at
org.apache.crunch.impl.spark.fn.PartitionedMapOutputFunction.call(PartitionedMapOutputFunction.java:62)
at
org.apache.crunch.impl.spark.fn.PartitionedMapOutputFunction.call(PartitionedMapOutputFunction.java:35)
at
org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1.apply(JavaPairRDD.scala:1002)
at
org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1.apply(JavaPairRDD.scala:1002)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at
org.apache.spark.util.collection.ExternalSorter.spillToPartitionFiles(ExternalSorter.scala:366)
at
org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:211)
at
org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:63)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:68)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
at org.apache.spark.scheduler.Task.run(Task.scala:64)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:203)
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)
{code}
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