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From "Ohad Zadok (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-10141) Number of tasks on executors still become negative after failures
Date Sun, 20 Sep 2015 07:55:04 GMT

    [ https://issues.apache.org/jira/browse/SPARK-10141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14877454#comment-14877454
] 

Ohad Zadok commented on SPARK-10141:
------------------------------------

happens to me as well on 1.5.0
When running LDA on ~1.5 Million documents, with 10 folds. 
When running with a lower number of folds (5) it sometimes manage to complete a full run.

Adding a stacktrace:
15/09/18 02:17:33 WARN scheduler.TaskSetManager: Lost task 47.0 in stage 45.0 (TID 31026,
172.31.15.3): TaskKilled (killed intentionally)
org.apache.spark.SparkException: Job aborted due to stage failure: Task 79 in stage 45.0 failed
4 times, most recent failure: Lost task 79.3 in stage 45.0 (TID 31021, 172.31.15.8): java.io.IOException:
Failed to connect to /172.31.15.8:53373
        at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:193)
        at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:156)
        at org.apache.spark.network.netty.NettyBlockTransferService$$anon$1.createAndStart(NettyBlockTransferService.scala:88)
        at org.apache.spark.network.shuffle.RetryingBlockFetcher.fetchAllOutstanding(RetryingBlockFetcher.java:140)
        at org.apache.spark.network.shuffle.RetryingBlockFetcher.access$200(RetryingBlockFetcher.java:43)
        at org.apache.spark.network.shuffle.RetryingBlockFetcher$1.run(RetryingBlockFetcher.java:170)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: /172.31.15.8:53373
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:744)
        at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:224)
        at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:289)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
        ... 1 more

Driver stacktrace:
        at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1280)
        at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1268)
        at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1267)
        at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
        at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
        at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1267)
        at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:697)
        at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:697)
        at scala.Option.foreach(Option.scala:236)
        at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:697)
        at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1493)
        at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1455)
        at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1444)
        at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
        at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:567)
        at org.apache.spark.SparkContext.runJob(SparkContext.scala:1813)
        at org.apache.spark.SparkContext.runJob(SparkContext.scala:1933)
        at org.apache.spark.rdd.RDD$$anonfun$fold$1.apply(RDD.scala:1059)
        at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:147)
        at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:108)
        at org.apache.spark.rdd.RDD.withScope(RDD.scala:306)
        at org.apache.spark.rdd.RDD.fold(RDD.scala:1053)
        at org.apache.spark.mllib.clustering.EMLDAOptimizer.computeGlobalTopicTotals(LDAOptimizer.scala:205)
        at org.apache.spark.mllib.clustering.EMLDAOptimizer.next(LDAOptimizer.scala:192)
        at org.apache.spark.mllib.clustering.EMLDAOptimizer.next(LDAOptimizer.scala:80)
        at org.apache.spark.mllib.clustering.LDA.run(LDA.scala:332)
        at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:40)
        at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:45)
        at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:47)
        at $iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:49)
        at $iwC$$iwC$$iwC$$iwC.<init>(<console>:51)
        at $iwC$$iwC$$iwC.<init>(<console>:53)
        at $iwC$$iwC.<init>(<console>:55)
        at $iwC.<init>(<console>:57)
        at <init>(<console>:59)
        at .<init>(<console>:63)
        at .<clinit>(<console>)
        at .<init>(<console>:7)
        at .<clinit>(<console>)
        at $print(<console>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:1065)
        at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1340)
        at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:840)
        at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:871)
        at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:819)
        at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:857)
        at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:902)
        at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:875)
        at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:902)
        at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:814)
        at org.apache.spark.repl.SparkILoop.processLine$1(SparkILoop.scala:657)
        at org.apache.spark.repl.SparkILoop.innerLoop$1(SparkILoop.scala:665)
        at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$loop(SparkILoop.scala:670)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1$$anonfun$apply$mcV$sp$1$$anonfun$apply$mcV$sp$2.apply(SparkILoop.scala:680)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1$$anonfun$apply$mcV$sp$1$$anonfun$apply$mcV$sp$2.apply(SparkILoop.scala:677)
        at scala.reflect.io.Streamable$Chars$class.applyReader(Streamable.scala:104)
        at scala.reflect.io.File.applyReader(File.scala:82)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(SparkILoop.scala:677)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1$$anonfun$apply$mcV$sp$1.apply(SparkILoop.scala:677)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1$$anonfun$apply$mcV$sp$1.apply(SparkILoop.scala:677)
        at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$savingReplayStack(SparkILoop.scala:162)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1.apply$mcV$sp(SparkILoop.scala:676)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1.apply(SparkILoop.scala:676)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$interpretAllFrom$1.apply(SparkILoop.scala:676)
        at org.apache.spark.repl.SparkILoop.savingReader(SparkILoop.scala:167)
        at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$interpretAllFrom(SparkILoop.scala:675)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$loadCommand$1.apply(SparkILoop.scala:740)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$loadCommand$1.apply(SparkILoop.scala:739)
        at org.apache.spark.repl.SparkILoop.withFile(SparkILoop.scala:733)
        at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$loadCommand(SparkILoop.scala:739)
        at org.apache.spark.repl.SparkILoop$$anonfun$standardCommands$7.apply(SparkILoop.scala:344)
        at org.apache.spark.repl.SparkILoop$$anonfun$standardCommands$7.apply(SparkILoop.scala:344)
        at scala.tools.nsc.interpreter.LoopCommands$LineCmd.apply(LoopCommands.scala:81)
        at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:809)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$loadFiles$1.apply(SparkILoop.scala:910)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$loadFiles$1.apply(SparkILoop.scala:908)
        at scala.collection.immutable.List.foreach(List.scala:318)
        at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$loadFiles(SparkILoop.scala:908)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply$mcZ$sp(SparkILoop.scala:995)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply(SparkILoop.scala:945)
        at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply(SparkILoop.scala:945)
        at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135)
        at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$process(SparkILoop.scala:945)
        at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:1059)
        at org.apache.spark.repl.Main$.main(Main.scala:31)
        at org.apache.spark.repl.Main.main(Main.scala)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:672)
        at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
        at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
        at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
        at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.io.IOException: Failed to connect to /172.31.15.8:53373
        at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:193)
        at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:156)
        at org.apache.spark.network.netty.NettyBlockTransferService$$anon$1.createAndStart(NettyBlockTransferService.scala:88)
        at org.apache.spark.network.shuffle.RetryingBlockFetcher.fetchAllOutstanding(RetryingBlockFetcher.java:140)
        at org.apache.spark.network.shuffle.RetryingBlockFetcher.access$200(RetryingBlockFetcher.java:43)
        at org.apache.spark.network.shuffle.RetryingBlockFetcher$1.run(RetryingBlockFetcher.java:170)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.ConnectException: Connection refused: /172.31.15.8:53373
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:744)
        at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:224)
        at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:289)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
        ... 1 more

> Number of tasks on executors still become negative after failures
> -----------------------------------------------------------------
>
>                 Key: SPARK-10141
>                 URL: https://issues.apache.org/jira/browse/SPARK-10141
>             Project: Spark
>          Issue Type: Bug
>          Components: Web UI
>    Affects Versions: 1.5.0
>            Reporter: Joseph K. Bradley
>            Priority: Minor
>         Attachments: Screen Shot 2015-08-20 at 3.14.49 PM.png
>
>
> I hit this failure when running LDA on EC2 (after I made the model size really big).
> I was using the LDAExample.scala code on an EC2 cluster with 16 workers (r3.2xlarge),
on a Wikipedia dataset:
> {code}
> Training set size (documents)	4534059
> Vocabulary size (terms)	10000
> Training set size (tokens)	895575317
> EM optimizer
> 1K topics
> {code}
> Failure message:
> {code}
> org.apache.spark.SparkException: Job aborted due to stage failure: Task 55 in stage 22.0
failed 4 times, most recent failure: Lost task 55.3 in stage 22.0 (TID 2881, 10.0.202.128):
java.io.IOException: Failed to connect to /10.0.202.128:54740
> at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:193)
> 	at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:156)
> 	at org.apache.spark.network.netty.NettyBlockTransferService$$anon$1.createAndStart(NettyBlockTransferService.scala:88)
> 	at org.apache.spark.network.shuffle.RetryingBlockFetcher.fetchAllOutstanding(RetryingBlockFetcher.java:140)
> 	at org.apache.spark.network.shuffle.RetryingBlockFetcher.access$200(RetryingBlockFetcher.java:43)
> 	at org.apache.spark.network.shuffle.RetryingBlockFetcher$1.run(RetryingBlockFetcher.java:170)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: java.net.ConnectException: Connection refused: /10.0.202.128:54740
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
> 	at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:224)
> 	at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:289)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
> 	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
> 	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
> 	... 1 more
> Driver stacktrace:
> 	at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1267)
> 	at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1255)
> 	at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1254)
> 	at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> 	at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
> 	at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1254)
> 	at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:684)
> 	at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:684)
> 	at scala.Option.foreach(Option.scala:236)
> 	at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:684)
> 	at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1480)
> 	at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1442)
> 	at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1431)
> 	at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
> 	at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:554)
> 	at org.apache.spark.SparkContext.runJob(SparkContext.scala:1805)
> 	at org.apache.spark.SparkContext.runJob(SparkContext.scala:1925)
> 	at org.apache.spark.rdd.RDD$$anonfun$fold$1.apply(RDD.scala:1059)
> 	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:147)
> 	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:108)
> 	at org.apache.spark.rdd.RDD.withScope(RDD.scala:306)
> 	at org.apache.spark.rdd.RDD.fold(RDD.scala:1053)
> 	at org.apache.spark.mllib.clustering.EMLDAOptimizer.computeGlobalTopicTotals(LDAOptimizer.scala:205)
> 	at org.apache.spark.mllib.clustering.EMLDAOptimizer.next(LDAOptimizer.scala:192)
> 	at org.apache.spark.mllib.clustering.EMLDAOptimizer.next(LDAOptimizer.scala:80)
> 	at org.apache.spark.mllib.clustering.LDA.run(LDA.scala:332)
> Caused by: java.io.IOException: Failed to connect to /10.0.202.128:54740
> 	at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:193)
> 	at org.apache.spark.network.client.TransportClientFactory.createClient(TransportClientFactory.java:156)
> 	at org.apache.spark.network.netty.NettyBlockTransferService$$anon$1.createAndStart(NettyBlockTransferService.scala:88)
> 	at org.apache.spark.network.shuffle.RetryingBlockFetcher.fetchAllOutstanding(RetryingBlockFetcher.java:140)
> 	at org.apache.spark.network.shuffle.RetryingBlockFetcher.access$200(RetryingBlockFetcher.java:43)
> 	at org.apache.spark.network.shuffle.RetryingBlockFetcher$1.run(RetryingBlockFetcher.java:170)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: java.net.ConnectException: Connection refused: /10.0.202.128:54740
> 	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
> 	at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:224)
> 	at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:289)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
> 	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
> 	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
> 	at java.lang.Thread.run(Thread.java:745)
> {code}



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