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https://issues.apache.org/jira/browse/SPARK-14505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15233863#comment-15233863
]
The sea commented on SPARK-14505:
---------------------------------
I know that we only support one SparkContext in the same jvm.But when running
the code like below, it will throw exception at line 10. Is this not a problem?
1. val sc = new SparkContext("spark://master:7077", "app")
2. println(sc.range(1, 10).reduce(_ + _))
3. try {
4. val sc2 = new SparkContext("local", "app") // here will throw
exception，but it will change SparkEnv!
5. println(sc2.range(1, 10).reduce(_ + _))
6. } catch {
7. case e: Exception =>
8. e.printStackTrace()
9. }
10. println(sc.range(1, 10).reduce(_ + _))
> Creating two SparkContext Object in the same jvm, the first one will can not
> run any tasks!
> --------------------------------------------------------------------------------------------
>
> Key: SPARK-14505
> URL: https://issues.apache.org/jira/browse/SPARK-14505
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.6.1
> Reporter: The sea
> Priority: Minor
>
> Execute code below in spark shell:
> import org.apache.spark.SparkContext
> val sc = new SparkContext("local", "app")
> sc.range(1, 10).reduce(_ + _)
> The exception is :
> 16/04/09 15:40:01 WARN scheduler.TaskSetManager: Lost task 1.0 in stage 1.0
> (TID 3, 192.168.172.131): java.io.IOException:
> org.apache.spark.SparkException: Failed to get broadcast_1_piece0 of
> broadcast_1
> at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1222)
> at
> org.apache.spark.broadcast.TorrentBroadcast.readBroadcastBlock(TorrentBroadcast.scala:165)
> at
> org.apache.spark.broadcast.TorrentBroadcast._value$lzycompute(TorrentBroadcast.scala:64)
> at
> org.apache.spark.broadcast.TorrentBroadcast._value(TorrentBroadcast.scala:64)
> at
> org.apache.spark.broadcast.TorrentBroadcast.getValue(TorrentBroadcast.scala:88)
> at org.apache.spark.broadcast.Broadcast.value(Broadcast.scala:70)
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:62)
> at org.apache.spark.scheduler.Task.run(Task.scala:89)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.spark.SparkException: Failed to get broadcast_1_piece0
> of broadcast_1
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1$$anonfun$2.apply(TorrentBroadcast.scala:138)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1$$anonfun$2.apply(TorrentBroadcast.scala:138)
> 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:137)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply(TorrentBroadcast.scala:120)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$org$apache$spark$broadcast$TorrentBroadcast$$readBlocks$1.apply(TorrentBroadcast.scala:120)
> at scala.collection.immutable.List.foreach(List.scala:318)
> at
> org.apache.spark.broadcast.TorrentBroadcast.org$apache$spark$broadcast$TorrentBroadcast$$readBlocks(TorrentBroadcast.scala:120)
> at
> org.apache.spark.broadcast.TorrentBroadcast$$anonfun$readBroadcastBlock$1.apply(TorrentBroadcast.scala:175)
> at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1219)
> ... 11 more
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