Github user davies commented on the pull request: https://github.com/apache/spark/pull/2941#issuecomment-60475340 It's not easy to reproduce this failure, but it did fail in jenkins: ``` ====================================================================== ERROR: test_reuse_worker_after_take (__main__.WorkerTests) ---------------------------------------------------------------------- Traceback (most recent call last): File "pyspark/tests.py", line 1437, in test_reuse_worker_after_take self.assertEqual(0, rdd.first()) File "/home/jenkins/workspace/SparkPullRequestBuilder/python/pyspark/rdd.py", line 1109, in first rs = self.take(1) File "/home/jenkins/workspace/SparkPullRequestBuilder/python/pyspark/rdd.py", line 1091, in take res = self.context.runJob(self, takeUpToNumLeft, p, True) File "/home/jenkins/workspace/SparkPullRequestBuilder/python/pyspark/context.py", line 796, in runJob it = self._jvm.PythonRDD.runJob(self._jsc.sc(), mappedRDD._jrdd, javaPartitions, allowLocal) File "/home/jenkins/workspace/SparkPullRequestBuilder/python/lib/py4j-0.8.2.1-src.zip/py4j/java_gateway.py", line 538, in __call__ self.target_id, self.name) File "/home/jenkins/workspace/SparkPullRequestBuilder/python/lib/py4j-0.8.2.1-src.zip/py4j/protocol.py", line 300, in get_return_value format(target_id, '.', name), value) Py4JJavaError: An error occurred while calling z:org.apache.spark.api.python.PythonRDD.runJob. : org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 0.0 failed 1 times, most recent failure: Lost task 0.0 in stage 0.0 (TID 0, localhost): java.net.SocketException: Connection reset java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:118) java.net.SocketOutputStream.write(SocketOutputStream.java:159) java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) java.io.BufferedOutputStream.write(BufferedOutputStream.java:126) java.io.DataOutputStream.write(DataOutputStream.java:107) java.io.FilterOutputStream.write(FilterOutputStream.java:97) org.apache.spark.api.python.PythonRDD$$anonfun$writeIteratorToStream$1.apply(PythonRDD.scala:395) org.apache.spark.api.python.PythonRDD$$anonfun$writeIteratorToStream$1.apply(PythonRDD.scala:393) scala.collection.Iterator$class.foreach(Iterator.scala:727) scala.collection.AbstractIterator.foreach(Iterator.scala:1157) org.apache.spark.api.python.PythonRDD$.writeIteratorToStream(PythonRDD.scala:393) org.apache.spark.api.python.PythonRDD$WriterThread$$anonfun$run$1.apply$mcV$sp(PythonRDD.scala:243) org.apache.spark.api.python.PythonRDD$WriterThread$$anonfun$run$1.apply(PythonRDD.scala:204) org.apache.spark.api.python.PythonRDD$WriterThread$$anonfun$run$1.apply(PythonRDD.scala:204) org.apache.spark.util.Utils$.logUncaughtExceptions(Utils.scala:1416) org.apache.spark.api.python.PythonRDD$WriterThread.run(PythonRDD.scala:203) Driver stacktrace: at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1191) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1180) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1179) at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47) at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1179) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:694) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:694) at scala.Option.foreach(Option.scala:236) at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:694) at org.apache.spark.scheduler.DAGSchedulerEventProcessActor$$anonfun$receive$2.applyOrElse(DAGScheduler.scala:1397) at akka.actor.Actor$class.aroundReceive(Actor.scala:465) at org.apache.spark.scheduler.DAGSchedulerEventProcessActor.aroundReceive(DAGScheduler.scala:1352) at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516) at akka.actor.ActorCell.invoke(ActorCell.scala:487) at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238) at akka.dispatch.Mailbox.run(Mailbox.scala:220) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) ```
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