I can able to read and print few lines. Afterthat i'm getting this exception. Any idea for this ?
*Thanks*, <https://in.linkedin.com/in/ramkumarcs31> On Thu, Oct 29, 2015 at 6:14 PM, Ramkumar V <ramkumar.c...@gmail.com> wrote: > Hi, > > I'm trying to read from kafka stream and printing it textfile. I'm using > java over spark. I dont know why i'm getting the following exception. > Also exception message is very abstract. can anyone please help me ? > > Log Trace : > > 15/10/29 12:15:09 ERROR scheduler.JobScheduler: Error in job generator > java.lang.NullPointerException > at > org.apache.spark.streaming.DStreamGraph$$anonfun$getMaxInputStreamRememberDuration$2.apply(DStreamGraph.scala:172) > at > org.apache.spark.streaming.DStreamGraph$$anonfun$getMaxInputStreamRememberDuration$2.apply(DStreamGraph.scala:172) > at > scala.collection.TraversableOnce$$anonfun$maxBy$1.apply(TraversableOnce.scala:225) > at > scala.collection.IndexedSeqOptimized$class.foldl(IndexedSeqOptimized.scala:51) > at > scala.collection.IndexedSeqOptimized$class.reduceLeft(IndexedSeqOptimized.scala:68) > at > scala.collection.mutable.ArrayBuffer.reduceLeft(ArrayBuffer.scala:47) > at > scala.collection.TraversableOnce$class.maxBy(TraversableOnce.scala:225) > at > scala.collection.AbstractTraversable.maxBy(Traversable.scala:105) > at > org.apache.spark.streaming.DStreamGraph.getMaxInputStreamRememberDuration(DStreamGraph.scala:172) > at > org.apache.spark.streaming.scheduler.JobGenerator.clearMetadata(JobGenerator.scala:267) > at org.apache.spark.streaming.scheduler.JobGenerator.org > $apache$spark$streaming$scheduler$JobGenerator$$processEvent(JobGenerator.scala:178) > at > org.apache.spark.streaming.scheduler.JobGenerator$$anon$1.onReceive(JobGenerator.scala:83) > at > org.apache.spark.streaming.scheduler.JobGenerator$$anon$1.onReceive(JobGenerator.scala:82) > at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) > 15/10/29 12:15:09 ERROR yarn.ApplicationMaster: User class threw > exception: java.lang.NullPointerException > java.lang.NullPointerException > at > org.apache.spark.streaming.DStreamGraph$$anonfun$getMaxInputStreamRememberDuration$2.apply(DStreamGraph.scala:172) > at > org.apache.spark.streaming.DStreamGraph$$anonfun$getMaxInputStreamRememberDuration$2.apply(DStreamGraph.scala:172) > at > scala.collection.TraversableOnce$$anonfun$maxBy$1.apply(TraversableOnce.scala:225) > at > scala.collection.IndexedSeqOptimized$class.foldl(IndexedSeqOptimized.scala:51) > at > scala.collection.IndexedSeqOptimized$class.reduceLeft(IndexedSeqOptimized.scala:68) > at > scala.collection.mutable.ArrayBuffer.reduceLeft(ArrayBuffer.scala:47) > at > scala.collection.TraversableOnce$class.maxBy(TraversableOnce.scala:225) > at > scala.collection.AbstractTraversable.maxBy(Traversable.scala:105) > at > org.apache.spark.streaming.DStreamGraph.getMaxInputStreamRememberDuration(DStreamGraph.scala:172) > at > org.apache.spark.streaming.scheduler.JobGenerator.clearMetadata(JobGenerator.scala:267) > at org.apache.spark.streaming.scheduler.JobGenerator.org > $apache$spark$streaming$scheduler$JobGenerator$$processEvent(JobGenerator.scala:178) > at > org.apache.spark.streaming.scheduler.JobGenerator$$anon$1.onReceive(JobGenerator.scala:83) > at > org.apache.spark.streaming.scheduler.JobGenerator$$anon$1.onReceive(JobGenerator.scala:82) > at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) > > > > *Thanks*, > <https://in.linkedin.com/in/ramkumarcs31> > >
