Github user javadba commented on the pull request: https://github.com/apache/spark/pull/1586#issuecomment-50951491 BTW I am seeing testing errors in core for MapOutputTracker involving OOME. I had to restart testing a few times already. This is not anything to do with the code of this PR, just trying to do overall regrssion testing but failing in unrelated tests. Oh. it just failed again: ClosureCleanerSuite: - closures inside an object *** FAILED *** org.apache.spark.SparkException: Error communicating with MapOutputTracker at org.apache.spark.MapOutputTracker.askTracker(MapOutputTracker.scala:111) at org.apache.spark.MapOutputTracker.sendTracker(MapOutputTracker.scala:117) at org.apache.spark.MapOutputTrackerMaster.stop(MapOutputTracker.scala:324) at org.apache.spark.SparkEnv.stop(SparkEnv.scala:83) at org.apache.spark.SparkContext.stop(SparkContext.scala:1003) at org.apache.spark.LocalSparkContext$.stop(LocalSparkContext.scala:50) at org.apache.spark.LocalSparkContext$.withSpark(LocalSparkContext.scala:61) at org.apache.spark.util.TestObject$.run(ClosureCleanerSuite.scala:76) at org.apache.spark.util.ClosureCleanerSuite$$anonfun$1.apply$mcV$sp(ClosureCleanerSuite.scala:27) at org.apache.spark.util.ClosureCleanerSuite$$anonfun$1.apply(ClosureCleanerSuite.scala:27) ... Cause: akka.pattern.AskTimeoutException: Recipient[Actor[akka://spark/user/MapOutputTracker#221210107]] had already been terminated. at akka.pattern.AskableActorRef$.ask$extension(AskSupport.scala:134) at org.apache.spark.MapOutputTracker.askTracker(MapOutputTracker.scala:106) at org.apache.spark.MapOutputTracker.sendTracker(MapOutputTracker.scala:117) at org.apache.spark.MapOutputTrackerMaster.stop(MapOutputTracker.scala:324) at org.apache.spark.SparkEnv.stop(SparkEnv.scala:83) at org.apache.spark.SparkContext.stop(SparkContext.scala:1003) at org.apache.spark.LocalSparkContext$.stop(LocalSparkContext.scala:50) at org.apache.spark.LocalSparkContext$.withSpark(LocalSparkContext.scala:61) at org.apache.spark.util.TestObject$.run(ClosureCleanerSuite.scala:76) at org.apache.spark.util.ClosureCleanerSuite$$anonfun$1.apply$mcV$sp(ClosureCleanerSuite.scala:27) ... *** RUN ABORTED *** java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method) at java.lang.Thread.start(Thread.java:679) at org.eclipse.jetty.util.thread.QueuedThreadPool.startThread(QueuedThreadPool.java:441) at org.eclipse.jetty.util.thread.QueuedThreadPool.doStart(QueuedThreadPool.java:108) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) at org.eclipse.jetty.util.component.AggregateLifeCycle.doStart(AggregateLifeCycle.java:81) at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:58) at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:96) at org.eclipse.jetty.server.Server.doStart(Server.java:282) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) ...
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