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): 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
