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Posted to dev@mina.apache.org by "Roberto Deandrea (JIRA)" <ji...@apache.org> on 2018/01/31 08:01:00 UTC
[jira] [Issue Comment Deleted] (SSHD-795) IOException (Broken pipe)
on a socket local forwarding channel causes SSH client-server connection
down
[ https://issues.apache.org/jira/browse/SSHD-795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Roberto Deandrea updated SSHD-795:
----------------------------------
Comment: was deleted
(was: [^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
>
>
> 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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