Christian Wuertz created SPARK-2578:
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Summary: RIGHT OUTER JOIN causes ClassCastException
Key: SPARK-2578
URL: https://issues.apache.org/jira/browse/SPARK-2578
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.0.0
Reporter: Christian Wuertz
When I run a hql query that contains a right outer join I always get this
exception:
{code}
org.apache.spark.SparkDriverExecutionException: Execution error
at
org.apache.spark.scheduler.DAGScheduler.handleTaskCompletion(DAGScheduler.scala:849)
at
org.apache.spark.scheduler.DAGSchedulerEventProcessActor$$anonfun$receive$2.applyOrElse(DAGScheduler.scala:1231)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498)
at akka.actor.ActorCell.invoke(ActorCell.scala:456)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)
at akka.dispatch.Mailbox.run(Mailbox.scala:219)
at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.ClassCastException: scala.collection.mutable.HashSet
cannot be cast to scala.collection.mutable.BitSet
at
org.apache.spark.sql.execution.BroadcastNestedLoopJoin$$anonfun$7.apply(joins.scala:338)
at org.apache.spark.rdd.RDD$$anonfun$19.apply(RDD.scala:811)
at org.apache.spark.rdd.RDD$$anonfun$19.apply(RDD.scala:808)
at
org.apache.spark.scheduler.JobWaiter.taskSucceeded(JobWaiter.scala:56)
at
org.apache.spark.scheduler.DAGScheduler.handleTaskCompletion(DAGScheduler.scala:845)
... 10 more
{code}
This can easily reproduced using the queries and data from this
[tutorial|http://hortonworks.com/hadoop-tutorial/how-to-process-data-with-apache-hive/].
Only the last query was modified to use a right outer join.
{code}
hiveContext.hql("SELECT a.year, a.player_id, a.runs from batting a JOIN (SELECT
year, max(runs) runs FROM batting GROUP BY year ) b ON (a.year = b.year AND
a.runs = b.runs)").collect.foreach(println)
{code}
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