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https://issues.apache.org/jira/browse/SSHD-795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16346392#comment-16346392
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Roberto Deandrea edited comment on SSHD-795 at 1/31/18 8:03 AM:
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Attached you can find the relevant traces where the problem happen.
The SSHD server is hosted at192.168.180.70, instead the SSH client is
192.168.190.2.
The local port forwarding channel where the broken pipe happen is versus
192.168.10.31:36228
[^brokenpipe.trace]
was (Author: roberto.deandrea):
Attached you can find the relevant traces where the problem happen.
The SSHD server is hosted at192.168.180.70, instead the SSH client is
192.168.190.2.
[^brokenpipe.trace]
> IOException (Broken pipe) on a socket local forwarding channel causes SSH
> client-server connection down
> -------------------------------------------------------------------------------------------------------
>
> Key: SSHD-795
> URL: https://issues.apache.org/jira/browse/SSHD-795
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 1.7.0
> Reporter: Roberto Deandrea
> Priority: Major
> Attachments: apache-sshd.trace.zip, brokenpipe.trace
>
>
> Hi,
> I have a problem with local port forwarding mechanism implemented in Apache
> SSHD.
> In my company we successfully use Apache SSHD library for secure local socket
> forwarding protocols.
> When on a local port forwarding channel an IOException (Broken pipe) happen
> for some reason (network, etc...), the SSH client server is being
> disconnected abruptly.
> I'm not convinced this is the right behavior. I think it is not necessary to
> bring down SSH client server connection because this is not a protocol
> violation, but a socket problem related to forwarded remote server connection.
> Please, can you comment about this issue ?
> Follow an excerpt of the traces :
> {quote}
> 2018-01-23 10:30:10,017 DEBUG [sshd-SshServer[1786f9d5]-nio2-thread-2 ]
> [Nio2Session.handleWriteCycleFailure]
> handleWriteCycleFailure(Nio2Session[local=/192.168.180.70:38957,
> remote=/192.168.10.31:36228]) failed (IOException) to write 32768 bytes:
> Broken pipe
> 2018-01-23 10:30:10,017 DEBUG [sshd-SshServer[1786f9d5]-nio2-thread-3 ]
> [Window.waitForSpace]
> waitForSpace(Window[server/remote](TcpipServerChannel[id=662,
> recipient=11]-ServerSessionImpl[circessh@/192.168.190.2:14840])) available:
> 1146880
> 2018-01-23 10:30:10,017 DEBUG [sshd-SshServer[1786f9d5]-nio2-thread-2 ]
> [TcpipServerChannel.handleWriteDataFailure]
> handleWriteDataFailure(TcpipServerChannel[id=662,
> recipient=11]-ServerSessionImpl[circessh@/192.168.190.2:14840])[SSH_MSG_CHANNEL_DATA]
> failed (IOException) to write len=32768: Broken pipe
> 2018-01-23 10:30:10,018 WARN [sshd-SshServer[1786f9d5]-nio2-thread-2 ]
> [AbstractSession.exceptionCaught]
> exceptionCaught(ServerSessionImpl[circessh@/192.168.190.2:14840])[state=Opened]
> IOException: Broken pipe
> 2018-01-23 10:30:10,018 DEBUG [sshd-SshServer[1786f9d5]-nio2-thread-3 ]
> [Window.waitAndConsume]
> waitAndConsume(Window[server/remote](TcpipServerChannel[id=662,
> recipient=11]-ServerSessionImpl[circessh@/192.168.190.2:14840])) -
> requested=32768, available=1146880
> 2018-01-23 10:30:10,018 DEBUG [sshd-SshServer[1786f9d5]-nio2-thread-2 ]
> [AbstractSession.exceptionCaught]
> exceptionCaught(ServerSessionImpl[circessh@/192.168.190.2:14840])[state=Opened]
> details
> java.io.IOException: Broken pipe
> at sun.nio.ch.FileDispatcherImpl.write0(Native Method)
> at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:47)
> at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93)
> at sun.nio.ch.IOUtil.write(IOUtil.java:65)
> at
> sun.nio.ch.UnixAsynchronousSocketChannelImpl.finishWrite(UnixAsynchronousSocketChannelImpl.java:582)
> at
> sun.nio.ch.UnixAsynchronousSocketChannelImpl.finish(UnixAsynchronousSocketChannelImpl.java:195)
> at
> sun.nio.ch.UnixAsynchronousSocketChannelImpl.onEvent(UnixAsynchronousSocketChannelImpl.java:213)
> at sun.nio.ch.EPollPort$EventHandlerTask.run(EPollPort.java:293)
> at java.lang.Thread.run(Thread.java:745)
> 2018-01-23 10:30:10,023 DEBUG [sshd-SshServer[1786f9d5]-nio2-thread-1 ]
> [Nio2Session.writePacket]
> writePacket(Nio2Session[local=/192.168.180.70:45470,
> remote=/192.168.10.31:22]) Writing 24780 bytes
> 2018-01-23 10:30:10,025 DEBUG [sshd-SshServer[1786f9d5]-nio2-thread-2 ]
> [SessionTimeoutListener.sessionException]
> sessionException(ServerSessionImpl[circessh@/192.168.190.2:14840])
> IOException: Broken pipe
> {quote}
>
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