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Brad commented on SPARK-22618: ------------------------------ Yeah the fix for broadcaset unpersist should be basically the same. Thanks Thomas. > RDD.unpersist can cause fatal exception when used with dynamic allocation > ------------------------------------------------------------------------- > > Key: SPARK-22618 > URL: https://issues.apache.org/jira/browse/SPARK-22618 > Project: Spark > Issue Type: Bug > Components: Spark Core > Affects Versions: 2.3.0 > Reporter: Brad > Assignee: Brad > Priority: Minor > Fix For: 2.3.0 > > > If you use rdd.unpersist() with dynamic allocation, then an executor can be > deallocated while your rdd is being removed, which will throw an uncaught > exception killing your job. > I looked into different ways of preventing this error from occurring but > couldn't come up with anything that wouldn't require a big change. I propose > the best fix is just to catch and log IOExceptions in unpersist() so they > don't kill your job. This will match the effective behavior when executors > are lost from dynamic allocation in other parts of the code. > In the worst case scenario I think this could lead to RDD partitions getting > left on executors after they were unpersisted, but this is probably better > than the whole job failing. I think in most cases the IOException would be > due to the executor dieing for some reason, which is effectively the same > result as unpersisting the rdd from that executor anyway. > I noticed this exception in a job that loads a 100GB dataset on a cluster > where we use dynamic allocation heavily. Here is the relevant stack trace > java.io.IOException: Connection reset by peer > at sun.nio.ch.FileDispatcherImpl.read0(Native Method) > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) > at sun.nio.ch.IOUtil.read(IOUtil.java:192) > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) > at > io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:221) > at > io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:899) > at > io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:276) > at > io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:119) > at > io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) > at > io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580) > at > io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497) > at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) > at > io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131) > at > io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138) > at java.lang.Thread.run(Thread.java:748) > Exception in thread "main" org.apache.spark.SparkException: Exception thrown > in awaitResult: > at > org.apache.spark.util.ThreadUtils$.awaitResult(ThreadUtils.scala:205) > at org.apache.spark.rpc.RpcTimeout.awaitResult(RpcTimeout.scala:75) > at > org.apache.spark.storage.BlockManagerMaster.removeRdd(BlockManagerMaster.scala:131) > at org.apache.spark.SparkContext.unpersistRDD(SparkContext.scala:1806) > at org.apache.spark.rdd.RDD.unpersist(RDD.scala:217) > at > com.ibm.sparktc.sparkbench.workload.exercise.CacheTest.doWorkload(CacheTest.scala:62) > at > com.ibm.sparktc.sparkbench.workload.Workload$class.run(Workload.scala:40) > at > com.ibm.sparktc.sparkbench.workload.exercise.CacheTest.run(CacheTest.scala:33) > at > com.ibm.sparktc.sparkbench.workload.SuiteKickoff$$anonfun$com$ibm$sparktc$sparkbench$workload$SuiteKickoff$$runSerially$1.apply(SuiteKickoff.scala:78) > at > com.ibm.sparktc.sparkbench.workload.SuiteKickoff$$anonfun$com$ibm$sparktc$sparkbench$workload$SuiteKickoff$$runSerially$1.apply(SuiteKickoff.scala:78) > at > scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234) > at > scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234) > at scala.collection.immutable.List.foreach(List.scala:381) > at > scala.collection.TraversableLike$class.map(TraversableLike.scala:234) > at scala.collection.immutable.List.map(List.scala:285) > at > com.ibm.sparktc.sparkbench.workload.SuiteKickoff$.com$ibm$sparktc$sparkbench$workload$SuiteKickoff$$runSerially(SuiteKickoff.scala:78) > at > com.ibm.sparktc.sparkbench.workload.SuiteKickoff$$anonfun$2.apply(SuiteKickoff.scala:52) > at > com.ibm.sparktc.sparkbench.workload.SuiteKickoff$$anonfun$2.apply(SuiteKickoff.scala:47) > at > scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241) > at > scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:241) > at scala.collection.immutable.Range.foreach(Range.scala:160) > at > scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:241) > at scala.collection.AbstractTraversable.flatMap(Traversable.scala:104) > at > com.ibm.sparktc.sparkbench.workload.SuiteKickoff$.run(SuiteKickoff.scala:47) > at > com.ibm.sparktc.sparkbench.workload.MultipleSuiteKickoff$$anonfun$com$ibm$sparktc$sparkbench$workload$MultipleSuiteKickoff$$runSuitesSerially$1.apply(MultipleSuiteKickoff.scala:24) > at > com.ibm.sparktc.sparkbench.workload.MultipleSuiteKickoff$$anonfun$com$ibm$sparktc$sparkbench$workload$MultipleSuiteKickoff$$runSuitesSerially$1.apply(MultipleSuiteKickoff.scala:24) > at scala.collection.immutable.List.foreach(List.scala:381) > at > com.ibm.sparktc.sparkbench.workload.MultipleSuiteKickoff$.com$ibm$sparktc$sparkbench$workload$MultipleSuiteKickoff$$runSuitesSerially(MultipleSuiteKickoff.scala:24) > at > com.ibm.sparktc.sparkbench.workload.MultipleSuiteKickoff$$anonfun$run$1.apply(MultipleSuiteKickoff.scala:13) > at > com.ibm.sparktc.sparkbench.workload.MultipleSuiteKickoff$$anonfun$run$1.apply(MultipleSuiteKickoff.scala:10) > at scala.collection.immutable.List.foreach(List.scala:381) > at > com.ibm.sparktc.sparkbench.workload.MultipleSuiteKickoff$.run(MultipleSuiteKickoff.scala:10) > at > com.ibm.sparktc.sparkbench.cli.CLIKickoff$.main(CLIKickoff.scala:16) > at com.ibm.sparktc.sparkbench.cli.CLIKickoff.main(CLIKickoff.scala) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > at > org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52) > at > org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:843) > at > org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:188) > at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:218) > at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:127) > at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) > Caused by: java.io.IOException: Connection reset by peer > at sun.nio.ch.FileDispatcherImpl.read0(Native Method) > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) > at sun.nio.ch.IOUtil.read(IOUtil.java:192) > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) > at > io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:221) > at > io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:899) > at > io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:276) > at > io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:119) > at > io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) > at > io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580) > at > io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497) > at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) > at > io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131) > at > io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138) > at java.lang.Thread.run(Thread.java:748) -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org