I have the exact error on my Jenkins 2.7.4 server connecting to Windows 
Server 2012 R2 with OpenSSH-Win64, Hmm... 

On Sunday, 4 September 2016 06:47:03 UTC+2, fross wrote:
>
> Hello,
>
>
> I'm trying to launch a Windows slave agent over SSH without success so far. 
> The agent is running Windows 8 and uses the Win64 port of OpenSSH (see here  
> <https://github.com/PowerShell/Win32-OpenSSH/releases/>and here 
> <https://winscp.net/eng/docs/guide_windows_openssh_server>). *Is the request 
> failing because of the SSH channel or because the agent is not supporting the 
> bash Unix shell? *So far I've been able to establish a connection between the 
> master (Windows) and the agent using a regular SSH client with a 
> user/password combination and also using public key authentication.
>
>
> Any help regarding this would be greatly appreciated! Thank you / merci.
>
>
> [09/04/16 00:21:13] [SSH] Opening SSH connection to slave01:22.
>
> [09/04/16 00:21:13] [SSH] Authentication successful.
> java.io.IOException: The execute request failed.
>       at 
> com.trilead.ssh2.channel.ChannelManager.requestExecCommand(ChannelManager.java:774)
>       at com.trilead.ssh2.Session.execCommand(Session.java:306)
>       at com.trilead.ssh2.Connection.exec(Connection.java:1553)
>       at 
> hudson.plugins.sshslaves.SSHLauncher.verifyNoHeaderJunk(SSHLauncher.java:872)
>       at hudson.plugins.sshslaves.SSHLauncher.access$100(SSHLauncher.java:137)
>       at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:713)
>       at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:706)
>       at java.util.concurrent.FutureTask.run(Unknown Source)
>       at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
>       at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>       at java.lang.Thread.run(Unknown Source)
> Caused by: java.io.IOException: This SSH2 channel is not open. state: 4
>       at 
> com.trilead.ssh2.channel.ChannelManager.ioException(ChannelManager.java:1543)
>       at 
> com.trilead.ssh2.channel.ChannelManager.waitForChannelRequestResult(ChannelManager.java:167)
>       at 
> com.trilead.ssh2.channel.ChannelManager.requestExecCommand(ChannelManager.java:769)
>       ... 10 more
> Caused by: java.io.IOException: The connection is being shutdown
>       at 
> com.trilead.ssh2.channel.ChannelManager.handleEndMessage(ChannelManager.java:1525)
>       at 
> com.trilead.ssh2.transport.TransportManager$1.run(TransportManager.java:522)
>       ... 1 more
> Caused by: java.net.SocketException: Connection reset
>       at java.net.SocketInputStream.read(Unknown Source)
>       at java.net.SocketInputStream.read(Unknown Source)
>       at 
> com.trilead.ssh2.crypto.cipher.CipherInputStream.fill_buffer(CipherInputStream.java:41)
>       at 
> com.trilead.ssh2.crypto.cipher.CipherInputStream.internal_read(CipherInputStream.java:52)
>       at 
> com.trilead.ssh2.crypto.cipher.CipherInputStream.getBlock(CipherInputStream.java:79)
>       at 
> com.trilead.ssh2.crypto.cipher.CipherInputStream.read(CipherInputStream.java:108)
>       at 
> com.trilead.ssh2.transport.TransportConnection.receiveMessage(TransportConnection.java:232)
>       at 
> com.trilead.ssh2.transport.TransportManager.receiveLoop(TransportManager.java:693)
>       at 
> com.trilead.ssh2.transport.TransportManager$1.run(TransportManager.java:489)
>       ... 1 more
> [09/04/16 00:21:13] Launch failed - cleaning up connection
> [09/04/16 00:21:13] [SSH] Connection closed.
>
>

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