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https://issues.apache.org/jira/browse/SPARK-17816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-17816:
------------------------------------
Assignee: (was: Apache Spark)
> Json serialzation of accumulators are failing with
> ConcurrentModificationException
> ----------------------------------------------------------------------------------
>
> Key: SPARK-17816
> URL: https://issues.apache.org/jira/browse/SPARK-17816
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.1.0
> Reporter: Ergin Seyfe
>
> This is the stack trace: See {{ConcurrentModificationException}}:
> {code}
> java.util.ConcurrentModificationException
> at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
> at java.util.ArrayList$Itr.next(ArrayList.java:851)
> at scala.collection.convert.Wrappers$JIteratorWrapper.next(Wrappers.scala:43)
> at scala.collection.Iterator$class.foreach(Iterator.scala:893)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
> at scala.collection.mutable.ListBuffer.$plus$plus$eq(ListBuffer.scala:183)
> at scala.collection.mutable.ListBuffer.$plus$plus$eq(ListBuffer.scala:45)
> at scala.collection.TraversableLike$class.to(TraversableLike.scala:590)
> at scala.collection.AbstractTraversable.to(Traversable.scala:104)
> at scala.collection.TraversableOnce$class.toList(TraversableOnce.scala:294)
> at scala.collection.AbstractTraversable.toList(Traversable.scala:104)
> at
> org.apache.spark.util.JsonProtocol$.accumValueToJson(JsonProtocol.scala:314)
> at
> org.apache.spark.util.JsonProtocol$$anonfun$accumulableInfoToJson$5.apply(JsonProtocol.scala:291)
> at
> org.apache.spark.util.JsonProtocol$$anonfun$accumulableInfoToJson$5.apply(JsonProtocol.scala:291)
> at scala.Option.map(Option.scala:146)
> at
> org.apache.spark.util.JsonProtocol$.accumulableInfoToJson(JsonProtocol.scala:291)
> at
> org.apache.spark.util.JsonProtocol$$anonfun$taskInfoToJson$12.apply(JsonProtocol.scala:283)
> at
> org.apache.spark.util.JsonProtocol$$anonfun$taskInfoToJson$12.apply(JsonProtocol.scala:283)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at scala.collection.immutable.List.foreach(List.scala:381)
> at
> scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
> at scala.collection.mutable.ListBuffer.foreach(ListBuffer.scala:45)
> at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
> at scala.collection.AbstractTraversable.map(Traversable.scala:104)
> at org.apache.spark.util.JsonProtocol$.taskInfoToJson(JsonProtocol.scala:283)
> at org.apache.spark.util.JsonProtocol$.taskEndToJson(JsonProtocol.scala:145)
> at org.apache.spark.util.JsonProtocol$.sparkEventToJson(JsonProtocol.scala:76)
> at
> org.apache.spark.scheduler.EventLoggingListener.logEvent(EventLoggingListener.scala:137)
> at
> org.apache.spark.scheduler.EventLoggingListener.onTaskEnd(EventLoggingListener.scala:157)
> at
> org.apache.spark.scheduler.SparkListenerBus$class.doPostEvent(SparkListenerBus.scala:45)
> at
> org.apache.spark.scheduler.LiveListenerBus.doPostEvent(LiveListenerBus.scala:35)
> at
> org.apache.spark.scheduler.LiveListenerBus.doPostEvent(LiveListenerBus.scala:35)
> at org.apache.spark.util.ListenerBus$class.postToAll(ListenerBus.scala:63)
> at
> org.apache.spark.scheduler.LiveListenerBus.postToAll(LiveListenerBus.scala:35)
> at
> org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(LiveListenerBus.scala:81)
> at
> org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply(LiveListenerBus.scala:66)
> at
> org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1$$anonfun$apply$mcV$sp$1.apply(LiveListenerBus.scala:66)
> at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
> at
> org.apache.spark.scheduler.LiveListenerBus$$anon$1$$anonfun$run$1.apply$mcV$sp(LiveListenerBus.scala:65)
> at org.apache.spark.util.Utils$.tryOrStopSparkContext(Utils.scala:1244)
> at
> org.apache.spark.scheduler.LiveListenerBus$$anon$1.run(LiveListenerBus.scala:64)
> {code}
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