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https://issues.apache.org/jira/browse/SPARK-17453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15514091#comment-15514091
]
Josh Rosen commented on SPARK-17453:
------------------------------------
There might be a race-condition here which could occur if multiple tasks
running on the same executor try to fetch the same broadcast variable piece. Do
you happen to have any executor logs from the executor with the {{ Block
broadcast_17_piece0 is already present in the MemoryStore}} error?
> Broadcast block already exists in MemoryStore
> ---------------------------------------------
>
> Key: SPARK-17453
> URL: https://issues.apache.org/jira/browse/SPARK-17453
> Project: Spark
> Issue Type: Bug
> Components: Block Manager, Spark Core
> Affects Versions: 2.0.0
> Reporter: Chris Bannister
>
> Whilst doing a broadcast join we reliably hit this exception, the code worked
> earlier on in 2.0.0 branch before release, and in 1.6. The data for the join
> is coming from another RDD which is collected to a Set and then broadcast.
> This is run in a Mesos cluster.
> Driver stacktrace:
> at
> org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1450)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1438)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1437)
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
> at
> org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1437)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:811)
> at
> org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:811)
> at scala.Option.foreach(Option.scala:257)
> at
> org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:811)
> at
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1659)
> at
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1618)
> at
> org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1607)
> at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
> at
> org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:632)
> at org.apache.spark.SparkContext.runJob(SparkContext.scala:1871)
> at org.apache.spark.SparkContext.runJob(SparkContext.scala:1884)
> at org.apache.spark.SparkContext.runJob(SparkContext.scala:1897)
> at org.apache.spark.SparkContext.runJob(SparkContext.scala:1911)
> at org.apache.spark.rdd.RDD$$anonfun$collect$1.apply(RDD.scala:893)
> at
> org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
> at
> org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
> at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
> at org.apache.spark.rdd.RDD.collect(RDD.scala:892)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:729)
> at
> org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:185)
> at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:210)
> at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:124)
> at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
> Caused by: java.io.IOException: java.lang.IllegalArgumentException:
> requirement failed: Block broadcast_17_piece0 is already present in the
> MemoryStore
> at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1260)
> at
> org.apache.spark.broadcast.TorrentBroadcast.readBroadcastBlock(TorrentBroadcast.scala:174)
> at
> org.apache.spark.broadcast.TorrentBroadcast._value$lzycompute(TorrentBroadcast.scala:65)
> at
> org.apache.spark.broadcast.TorrentBroadcast._value(TorrentBroadcast.scala:65)
> at
> org.apache.spark.broadcast.TorrentBroadcast.getValue(TorrentBroadcast.scala:89)
> at org.apache.spark.broadcast.Broadcast.value(Broadcast.scala:70)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:72)
> at
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:47)
> at org.apache.spark.scheduler.Task.run(Task.scala:85)
> at
> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.IllegalArgumentException: requirement failed: Block
> broadcast_17_piece0 is already present in the MemoryStore
> at scala.Predef$.require(Predef.scala:224)
> at
> org.apache.spark.storage.memory.MemoryStore.putBytes(MemoryStore.scala:144)
> at
> org.apache.spark.storage.BlockManager$$anonfun$doPutBytes$1.apply(BlockManager.scala:792)
> at
> org.apache.spark.storage.BlockManager$$anonfun$doPutBytes$1.apply(BlockManager.scala:761)
> at org.apache.spark.storage.BlockManager.doPut(BlockManager.scala:866)
> at
> org.apache.spark.storage.BlockManager.doPutBytes(BlockManager.scala:761)
> at
> org.apache.spark.storage.BlockManager.putBytes(BlockManager.scala:740)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply$mcVI$sp(TorrentBroadcast.scala:140)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply(TorrentBroadcast.scala:125)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply(TorrentBroadcast.scala:125)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at
> org.apache.spark.broadcast.TorrentBroadcast.org$apache$spark$broadcast$TorrentBroadcast$$readBlocks(TorrentBroadcast.scala:125)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$readBroadcastBlock$1.apply(TorrentBroadcast.scala:186)
> at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1253)
> ... 12 more
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