Please see SPARK-8142 On Mon, Sep 28, 2015 at 1:45 PM, amitra123 <amit...@hotmail.com> wrote:
> Hello All, > > I am trying to write a very simply Spark Streaming example problem and I m > getting this exception. I am new to Spark and I am not quite sure why this > exception is thrown. Wondering if someone has any clues. Here is the > backtrace. I am running this on Spark 1.5.0. > > org.apache.spark.SparkException: Job aborted due to stage failure: Task 9 > in > stage 0.0 failed 4 times, most recent failure: Lost task 9.3 in stage 0.0 > (TID 17, 112.XXX.XXX.XXX): java.lang.ClassCastException: > org.apache.spark.scheduler.ResultTask cannot be cast to > org.apache.spark.scheduler.Task > at > org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:194) > at > > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > at > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > at java.lang.Thread.run(Thread.java:745) > > Driver stacktrace: > at > org.apache.spark.scheduler.DAGScheduler.org > $apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1280) > at > > org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1268) > at > > org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1267) > at > > scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) > at > scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47) > at > org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1267) > at > > org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:697) > at > > org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:697) > at scala.Option.foreach(Option.scala:236) > at > > org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:697) > at > > org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1493) > at > > org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1455) > at > > org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1444) > at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) > at > org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:567) > at org.apache.spark.SparkContext.runJob(SparkContext.scala:1813) > at org.apache.spark.SparkContext.runJob(SparkContext.scala:1826) > at org.apache.spark.SparkContext.runJob(SparkContext.scala:1839) > at org.apache.spark.SparkContext.runJob(SparkContext.scala:1910) > at > org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1.apply(RDD.scala:898) > at > org.apache.spark.rdd.RDD$$anonfun$foreachPartition$1.apply(RDD.scala:896) > at > > org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:147) > at > > org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:108) > at org.apache.spark.rdd.RDD.withScope(RDD.scala:306) > at org.apache.spark.rdd.RDD.foreachPartition(RDD.scala:896) > at > > org.apache.spark.api.java.JavaRDDLike$class.foreachPartition(JavaRDDLike.scala:222) > at > > org.apache.spark.api.java.AbstractJavaRDDLike.foreachPartition(JavaRDDLike.scala:47) > at > > com.ay.spark.example.SparkWordCountStreaming.outputRdd(SparkWordCountStreaming.java:172) > at > > com.ay.spark.example.SparkWordCountStreaming.lambda$start$b852b88$1(SparkWordCountStreaming.java:123) > at > > com.ay.spark.example.SparkWordCountStreaming$$Lambda$9/1640832113.call(Unknown > Source) > at > > org.apache.spark.streaming.api.java.JavaDStreamLike$$anonfun$foreachRDD$1.apply(JavaDStreamLike.scala:315) > at > > org.apache.spark.streaming.api.java.JavaDStreamLike$$anonfun$foreachRDD$1.apply(JavaDStreamLike.scala:315) > at > > org.apache.spark.streaming.dstream.DStream$$anonfun$foreachRDD$1$$anonfun$apply$mcV$sp$3.apply(DStream.scala:631) > at > > org.apache.spark.streaming.dstream.DStream$$anonfun$foreachRDD$1$$anonfun$apply$mcV$sp$3.apply(DStream.scala:631) > at > > org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ForEachDStream.scala:42) > at > > org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(ForEachDStream.scala:40) > at > > org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(ForEachDStream.scala:40) > at > > org.apache.spark.streaming.dstream.DStream.createRDDWithLocalProperties(DStream.scala:399) > at > > org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply$mcV$sp(ForEachDStream.scala:40) > at > > org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply(ForEachDStream.scala:40) > at > > org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply(ForEachDStream.scala:40) > at scala.util.Try$.apply(Try.scala:161) > at org.apache.spark.streaming.scheduler.Job.run(Job.scala:34) > at > > org.apache.spark.streaming.scheduler.JobScheduler$JobHandler$$anonfun$run$1.apply$mcV$sp(JobScheduler.scala:207) > at > > org.apache.spark.streaming.scheduler.JobScheduler$JobHandler$$anonfun$run$1.apply(JobScheduler.scala:207) > at > > org.apache.spark.streaming.scheduler.JobScheduler$JobHandler$$anonfun$run$1.apply(JobScheduler.scala:207) > at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57) > at > > org.apache.spark.streaming.scheduler.JobScheduler$JobHandler.run(JobScheduler.scala:206) > 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) > > > > -- > View this message in context: > http://apache-spark-user-list.1001560.n3.nabble.com/java-lang-ClassCastException-org-apache-spark-scheduler-ResultTask-cannot-be-cast-to-org-apache-spar-tp24851.html > Sent from the Apache Spark User List mailing list archive 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