Nicholas Chammas created SPARK-3333: ---------------------------------------
Summary: Large number of partitions causes OOM Key: SPARK-3333 URL: https://issues.apache.org/jira/browse/SPARK-3333 Project: Spark Issue Type: Bug Components: PySpark Affects Versions: 1.1.0 Environment: EC2; 1 master; 1 slave; {{m3.xlarge}} instances Reporter: Nicholas Chammas Here’s a repro for PySpark: {code} a = sc.parallelize(["Nick", "John", "Bob"]) a = a.repartition(24000) a.keyBy(lambda x: len(x)).reduceByKey(lambda x,y: x + y).take(1) {code} This code runs fine on 1.0.2. It returns the following result in just over a minute: {code} [(4, 'NickJohn')] {code} However, when I try this with 1.1.0-rc3 on an identically-sized cluster, it runs for a very, very long time and then fails with {{java.lang.OutOfMemoryError: Java heap space}}. Here is a stack trace taken from a run on 1.1.0-rc2: {code} >>> a = sc.parallelize(["Nick", "John", "Bob"]) >>> a = a.repartition(24000) >>> a.keyBy(lambda x: len(x)).reduceByKey(lambda x,y: x + y).take(1) 14/08/29 21:53:40 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(0, ip-10-138-29-167.ec2.internal, 46252, 0) with no recent heart beats: 175143ms exceeds 45000ms 14/08/29 21:53:50 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(10, ip-10-138-18-106.ec2.internal, 33711, 0) with no recent heart beats: 175359ms exceeds 45000ms 14/08/29 21:54:02 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(19, ip-10-139-36-207.ec2.internal, 52208, 0) with no recent heart beats: 173061ms exceeds 45000ms 14/08/29 21:54:13 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(5, ip-10-73-142-70.ec2.internal, 56162, 0) with no recent heart beats: 176816ms exceeds 45000ms 14/08/29 21:54:22 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(7, ip-10-236-145-200.ec2.internal, 40959, 0) with no recent heart beats: 182241ms exceeds 45000ms 14/08/29 21:54:40 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(4, ip-10-139-1-195.ec2.internal, 49221, 0) with no recent heart beats: 178406ms exceeds 45000ms 14/08/29 21:54:41 ERROR Utils: Uncaught exception in thread Result resolver thread-3 java.lang.OutOfMemoryError: Java heap space at com.esotericsoftware.kryo.io.Input.readBytes(Input.java:296) at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ByteArraySerializer.read(DefaultArraySerializers.java:35) at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ByteArraySerializer.read(DefaultArraySerializers.java:18) at com.esotericsoftware.kryo.Kryo.readObjectOrNull(Kryo.java:699) at com.esotericsoftware.kryo.serializers.FieldSerializer$ObjectField.read(FieldSerializer.java:611) at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:221) at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:729) at org.apache.spark.serializer.KryoSerializerInstance.deserialize(KryoSerializer.scala:162) at org.apache.spark.scheduler.DirectTaskResult.value(TaskResult.scala:79) at org.apache.spark.scheduler.TaskSetManager.handleSuccessfulTask(TaskSetManager.scala:514) at org.apache.spark.scheduler.TaskSchedulerImpl.handleSuccessfulTask(TaskSchedulerImpl.scala:355) at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply$mcV$sp(TaskResultGetter.scala:68) at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply(TaskResultGetter.scala:47) at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply(TaskResultGetter.scala:47) at org.apache.spark.util.Utils$.logUncaughtExceptions(Utils.scala:1311) at org.apache.spark.scheduler.TaskResultGetter$$anon$2.run(TaskResultGetter.scala:46) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Exception in thread "Result resolver thread-3" 14/08/29 21:56:26 ERROR SendingConnection: Exception while reading SendingConnection to ConnectionManagerId(ip-10-73-142-223.ec2.internal,54014) java.nio.channels.ClosedChannelException at sun.nio.ch.SocketChannelImpl.ensureReadOpen(SocketChannelImpl.java:252) at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:295) at org.apache.spark.network.SendingConnection.read(Connection.scala:390) at org.apache.spark.network.ConnectionManager$$anon$7.run(ConnectionManager.scala:199) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) java.lang.OutOfMemoryError: Java heap space at com.esotericsoftware.kryo.io.Input.readBytes(Input.java:296) at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ByteArraySerializer.read(DefaultArraySerializers.java:35) at com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ByteArraySerializer.read(DefaultArraySerializers.java:18) at com.esotericsoftware.kryo.Kryo.readObjectOrNull(Kryo.java:699) at com.esotericsoftware.kryo.serializers.FieldSerializer$ObjectField.read(FieldSerializer.java:611) at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:221) at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:729) at org.apache.spark.serializer.KryoSerializerInstance.deserialize(KryoSerializer.scala:162) at org.apache.spark.scheduler.DirectTaskResult.value(TaskResult.scala:79) at org.apache.spark.scheduler.TaskSetManager.handleSuccessfulTask(TaskSetManager.scala:514) at org.apache.spark.scheduler.TaskSchedulerImpl.handleSuccessfulTask(TaskSchedulerImpl.scala:355) at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply$mcV$sp(TaskResultGetter.scala:68) at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply(TaskResultGetter.scala:47) at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply(TaskResultGetter.scala:47) at org.apache.spark.util.Utils$.logUncaughtExceptions(Utils.scala:1311) at org.apache.spark.scheduler.TaskResultGetter$$anon$2.run(TaskResultGetter.scala:46) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) 14/08/29 21:54:43 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(6, ip-10-137-1-139.ec2.internal, 42539, 0) with no recent heart beats: 183978ms exceeds 45000ms 14/08/29 21:57:42 ERROR ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(ip-10-138-9-33.ec2.internal,41924) not found 14/08/29 21:57:51 WARN BlockManagerMasterActor: Removing BlockManager BlockManagerId(11, ip-10-236-181-116.ec2.internal, 46847, 0) with no recent heart beats: 178629ms exceeds 45000ms 14/08/29 21:57:43 ERROR ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(ip-10-137-1-139.ec2.internal,42539) not found 14/08/29 21:57:54 ERROR SendingConnection: Exception while reading SendingConnection to ConnectionManagerId(ip-10-141-136-168.ec2.internal,42960) java.nio.channels.ClosedChannelException at sun.nio.ch.SocketChannelImpl.ensureReadOpen(SocketChannelImpl.java:252) at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:295) at org.apache.spark.network.SendingConnection.read(Connection.scala:390) at org.apache.spark.network.ConnectionManager$$anon$7.run(ConnectionManager.scala:199) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org