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Posted to dev@mina.apache.org by "Feng Jiajie (Jira)" <ji...@apache.org> on 2020/09/01 03:45:00 UTC

[jira] [Commented] (SSHD-1069) SSHD stuck when parallel is greater than number of IO threads

    [ https://issues.apache.org/jira/browse/SSHD-1069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17188118#comment-17188118 ] 

Feng Jiajie commented on SSHD-1069:
-----------------------------------

Hi [~gnodet], sorry to bother you, please help to see if this is a related issue with https://issues.apache.org/jira/browse/SSHD-1003 and https://issues.apache.org/jira/browse/SSHD-557

> SSHD stuck when parallel is greater than number of IO threads
> -------------------------------------------------------------
>
>                 Key: SSHD-1069
>                 URL: https://issues.apache.org/jira/browse/SSHD-1069
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 2.5.1
>            Reporter: Feng Jiajie
>            Priority: Major
>
> Step1. SSHD server:
> {code:java}
> import org.apache.sshd.common.FactoryManager;
> import org.apache.sshd.common.PropertyResolverUtils;
> import org.apache.sshd.common.util.security.SecurityUtils;
> import org.apache.sshd.server.SshServer;
> import org.apache.sshd.server.forward.AcceptAllForwardingFilter;
> import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider;
> import java.io.IOException;
> import java.nio.file.Paths;
> public class TestSshd2 {
>   public static void main(String[] args) throws IOException, InterruptedException {
>     SecurityUtils.setAPrioriDisabledProvider("BC", true);
>     SshServer sshd = SshServer.setUpDefaultServer();
>     // PropertyResolverUtils.updateProperty(sshd, FactoryManager.NIO_WORKERS, 32);
>     sshd.setPort(12133);
>     sshd.setKeyPairProvider(new SimpleGeneratorHostKeyProvider(Paths.get("/tmp/aa.key")));
>     sshd.setPasswordAuthenticator((username, password, session) -> true);
>     sshd.setForwardingFilter(AcceptAllForwardingFilter.INSTANCE);
>     sshd.start();
>     Thread.sleep(100000000);
>   }
> }
> {code}
> Step2. start ssh client and iperf3 server: 
> {code:java}
> ssh -o 'ExitOnForwardFailure yes' -p 12133 -f -x -N -T -R 0.0.0.0:15678:127.0.0.1:12345 test5@127.0.0.1
> iperf3 -s -p 12345
> {code}
> Step3. run iperf3 client: 
> {code:java}
> iperf3 -c 127.0.0.1 -i 1 -t 20 -p 15678 -P 16
> {code}
> -P, --parallel # number of parallel client streams to run
> The problem can be reliably reproduced when -P is greater than the number of IO threads (the default is CPU cores +1).
> The problem disappears by turning up the FactoryManager.NIO_WORKERS: 
> {code:java}
> PropertyResolverUtils.updateProperty(sshd, FactoryManager.NIO_WORKERS, 32);
> {code}
> jstack when SSHD is stuck:
> {code:java}
> "sshd-SshServer[467aecef](port=12133)-nio2-thread-5" #16 daemon prio=5 os_prio=0 tid=0x00007f7c70010800 nid=0x181cb in Object.wait() [0x00007f7cb9500000]
>    java.lang.Thread.State: TIMED_WAITING (on object monitor)
>         at java.lang.Object.wait(Native Method)
>         - waiting on <0x00000005d058d5b0> (a org.apache.sshd.common.channel.Window)
>         at org.apache.sshd.common.channel.Window.waitForCondition(Window.java:294)
>         at org.apache.sshd.common.channel.Window.waitForSpace(Window.java:255)
>         - locked <0x00000005d058d5b0> (a org.apache.sshd.common.channel.Window)
>         at org.apache.sshd.common.channel.ChannelOutputStream.flush(ChannelOutputStream.java:197)
>         - locked <0x00000005d058cf98> (a org.apache.sshd.common.channel.ChannelOutputStream)
>         at org.apache.sshd.client.channel.ClientChannelPendingMessagesQueue.writeMessage(ClientChannelPendingMessagesQueue.java:175)
>         at org.apache.sshd.client.channel.ClientChannelPendingMessagesQueue.handleIncomingMessage(ClientChannelPendingMessagesQueue.java:150)
>         - locked <0x00000005d058d098> (a java.util.LinkedList)
>         at org.apache.sshd.common.forward.DefaultForwardingFilter$StaticIoHandler.messageReceived(DefaultForwardingFilter.java:1151)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:356)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker.invokeDirect(Invoker.java:157)
>         at sun.nio.ch.UnixAsynchronousSocketChannelImpl.implRead(UnixAsynchronousSocketChannelImpl.java:553)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:276)
>         at sun.nio.ch.AsynchronousSocketChannelImpl.read(AsynchronousSocketChannelImpl.java:297)
>         at org.apache.sshd.common.io.nio2.Nio2Session.doReadCycle(Nio2Session.java:385)
>         at org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:360)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
>         at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$$Lambda$35/1285889028.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at sun.nio.ch.Invoker$2.run(Invoker.java:218)
>         at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>         at java.lang.Thread.run(Thread.java:748)
> {code}



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