This problem happen in Spark 1.3.1. It happen when two jobs are running simultaneously each in its own Spark Context.
I don’t remember seeing this bug in Spark 1.2.0. Is it a new bug introduced in Spark 1.3.1? Ningjun From: Ted Yu [mailto:yuzhih...@gmail.com] Sent: Wednesday, May 06, 2015 11:32 AM To: Wang, Ningjun (LNG-NPV) Cc: user@spark.apache.org Subject: Re: java.io.IOException: org.apache.spark.SparkException: Failed to get broadcast_2_piece0 Which release of Spark are you using ? Thanks On May 6, 2015, at 8:03 AM, Wang, Ningjun (LNG-NPV) <ningjun.w...@lexisnexis.com<mailto:ningjun.w...@lexisnexis.com>> wrote: I run a job on spark standalone cluster and got the exception below Here is the line of code that cause problem val myRdd: RDD[(String, String, String)] = … // RDD of (docid, cattegory, path) myRdd.persist(StorageLevel.MEMORY_AND_DISK_SER) val cats: Array[String] = myRdd.map(t => t._2).distinct().collect() // This line cause the exception 15/05/06 10:48:51 WARN TaskSetManager: Lost task 0.0 in stage 0.0 (TID 0, LAB4-WIN03.pcc.lexisnexis.com<http://LAB4-WIN03.pcc.lexisnexis.com>): java.io.IOException: org.apache.spark.SparkException: Failed to get broadcast_2_piece0 of broadcast_2 at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1156) at org.apache.spark.broadcast.TorrentBroadcast.readBroadcastBlock(TorrentBroadcast.scala:164) at org.apache.spark.broadcast.TorrentBroadcast._value$lzycompute(TorrentBroadcast.scala:64) at org.apache.spark.broadcast.TorrentBroadcast._value(TorrentBroadcast.scala:64) at org.apache.spark.broadcast.TorrentBroadcast.getValue(TorrentBroadcast.scala:87) at org.apache.spark.broadcast.Broadcast.value(Broadcast.scala:70) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:61) 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$TaskRunner.run(Executor.scala:203) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.spark.SparkException: Failed to get broadcast_2_piece0 of broadcast_2 at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBr oadcast$$readBlocks$1$$anonfun$2.apply(TorrentBroadcast.scala:137) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBr oadcast$$readBlocks$1$$anonfun$2.apply(TorrentBroadcast.scala:137) at scala.Option.getOrElse(Option.scala:120) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBr oadcast$$readBlocks$1.apply$mcVI$sp(TorrentBroadcast.scala:136) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBr oadcast$$readBlocks$1.apply(TorrentBroadcast.scala:119) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBr oadcast$$readBlocks$1.apply(TorrentBroadcast.scala:119) at scala.collection.immutable.List.foreach(List.scala:318) at org.apache.spark.broadcast.TorrentBroadcast.org$apache$spark$broadcast$TorrentBroadcast$$ readBlocks(TorrentBroadcast.scala:119) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$readBroadcastBlock$1.apply(TorrentBr oadcast.scala:174) at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1153) ... 12 more Any idea what cause the problem and how to avoid it? Thanks Ningjun
