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https://issues.apache.org/jira/browse/SPARK-9594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14695202#comment-14695202
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Herman van Hovell commented on SPARK-9594:
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This is more of a question for the user group or SO.
Anyway, you cannot use an Accumulator the way you are doing, since they are
write only. If you need some sort of an id use {{RDD.zipWithUniqueId}} of
dataframe's {{monotonicallyIncreasingId}} , true sequential number require
sorting.
> Failed to get broadcast_33_piece0 while using Accumulators in UDF
> ------------------------------------------------------------------
>
> Key: SPARK-9594
> URL: https://issues.apache.org/jira/browse/SPARK-9594
> Project: Spark
> Issue Type: Test
> Components: SQL
> Environment: Amazon Linux AMI release 2014.09
> Reporter: Poorvi Lashkary
> Priority: Minor
>
> Getting Below Exception while using accumulator in a UDF.
> java.io.IOException: org.apache.spark.SparkException: Failed to get
> broadcast_33_piece0 of broadcast_33
> 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.ResultTask.runTask(ResultTask.scala:58)
> 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_33_piece0
> of broadcast_33
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1$$anonfun$2.apply(TorrentBroadcast.scala:137)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1$$anonfun$2.apply(TorrentBroadcast.scala:137)
> at scala.Option.getOrElse(Option.scala:120)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply$mcVI$sp(TorrentBroadcast.scala:136)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply(TorrentBroadcast.scala:119)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$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$1.apply(TorrentBroadcast.scala:174)
> at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1153)
> ... 11 more
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