[jira] [Created] (HIVE-7540) NotSerializableException encountered when using sortByKey transformation

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

Rui Li created HIVE-7540:
----------------------------

             Summary: NotSerializableException encountered when using sortByKey transformation
                 Key: HIVE-7540
                 URL: https://issues.apache.org/jira/browse/HIVE-7540
             Project: Hive
          Issue Type: Bug
          Components: Spark
         Environment: Spark-1.0.1
            Reporter: Rui Li


This exception is thrown when sortByKey is used as the shuffle transformation between MapWork and ReduceWork:
{quote}
org.apache.spark.SparkException: Job aborted due to stage failure: Task not serializable: java.io.NotSerializableException: org.apache.hadoop.io.BytesWritable
    at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1049)
    at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1033)
    at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1031)
    at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
    at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
    at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1031)
    at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$submitMissingTasks(DAGScheduler.scala:772)
    at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$submitStage(DAGScheduler.scala:715)
    at org.apache.spark.scheduler.DAGScheduler$$anonfun$org$apache$spark$scheduler$DAGScheduler$$submitStage$4.apply(DAGScheduler.scala:719)
    at org.apache.spark.scheduler.DAGScheduler$$anonfun$org$apache$spark$scheduler$DAGScheduler$$submitStage$4.apply(DAGScheduler.scala:718)
    at scala.collection.immutable.List.foreach(List.scala:318)
    at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$submitStage(DAGScheduler.scala:718)
    at org.apache.spark.scheduler.DAGScheduler.handleJobSubmitted(DAGScheduler.scala:699)
…
{quote}

 The root cause is that the RangePartitioner used by sortByKey contains rangeBounds: Array[BytesWritable], which is considered not serializable in spark.
A workaround to this issue is to set the number of partitions to 1 when calling sortByKey, in which case the rangeBounds will be just an empty array.

NO PRECOMMIT TESTS. This is for spark branch only.



--
This message was sent by Atlassian JIRA
(v6.2#6252)