Vscode-remote-release: Can't connect to Ubuntu: unreachable or not Linux x86_64 - IO is still pending on closed socket

[roycyt]

• VSCode Version: 1.34.0-insider (user setup)
• Local OS Version: Windows 10 Build 1803
• Remote OS Version: Xubuntu 16.04 (4.15.0-47-generic x86_64)
• Remote Extension/Connection Type: SSH

Steps to Reproduce:

1. Click the "Connect to Host in New Window" on the Remote-SSH connections explorer
2. Wait a few seconds and show this error message:

Can't connect to Ubuntu: unreachable or not Linux x86_64 (close - IO is still pending on closed socket. read:1, write:0, io:000001F7A38762B0)

Does this issue occur when you try this locally?: Yes
Does this issue occur when you try this locally and all extensions are disabled?: Yes

I specify to use C:\Users\Roy_Chen\.ssh\config:

Host Ubuntu
    HostName 10.144.44.42
    User roy

I can use the Windows ssh command to connect to 10.144.44.42 with key based authentication.

If I let the vscode terminal panel keep open, I can see the welcome message of my remote server.

After checked the sshd journal logs, it turned out that vscode disconnect from the server for unknown reasons.

 5月 03 16:37:57 Xubuntu1604 sshd[4484]: Accepted publickey for roy from 10.144.44.44 port 63422 ssh2: RSA SHA256:SOdmHm2QTYMkwP92+Htc4hSyQQ9uEYHh0QOZLMLsVHk
 5月 03 16:37:57 Xubuntu1604 sshd[4484]: pam_unix(sshd:session): session opened for user roy by (uid=0)
 5月 03 16:37:57 Xubuntu1604 systemd-logind[852]: New session 163 of user roy.
 5月 03 16:37:57 Xubuntu1604 systemd[1]: Started Session 163 of user roy.
 5月 03 16:37:58 Xubuntu1604 sshd[4514]: Received disconnect from 10.144.44.44 port 63422:11: disconnected by user
 5月 03 16:37:58 Xubuntu1604 sshd[4514]: Disconnected from 10.144.44.44 port 63422
 5月 03 16:37:58 Xubuntu1604 sshd[4484]: pam_unix(sshd:session): session closed for user roy
 5月 03 16:37:58 Xubuntu1604 systemd-logind[852]: Removed session 163.

[gregvanl]

Doc feedback verbatim with similar issue:

"tried the remote extension but got following error on all test hosts: Cant connect to xxx_host: unreachable or not Linux x86_64 (ory). the ssh client is in the path and verified to be able to access all of the test nodes from windows prompt cmdline."

[roblourens]

@roycyt could you share the full contents of the "Remote - SSH" output channel?

[ydcool]

got the same problem. all outputs in remote-ssh window below:

Confirming that test-server-97 is a valid reachable host
Running type "C:\Users\DOM~1\AppData\Local\Temp\vscode-linux-multi-line-command-test-server-97.sh" | ssh  test-server-97 to confirm the host platform
> 
> Pseudo-terminal will not be allocated because stdin is not a terminal.
> 
> Welcome to Ubuntu 16.04.5 LTS (GNU/Linux 4.4.0-131-generic x86_64)
> 
>  * Documentation:  https://help.ubuntu.com
>  * Management:     https://landscape.canonical.com
>  * Support:        https://ubuntu.com/advantage
> Linux x86_64
> 10
>  - IO is still pending on closed socket. read:1, write:0, io:000001EA9C8CAC
"uname" terminal command done
test-server-97: unreachable or not Linux x86_64. ( - IO is still pending on closed socket. read:1, write:0, io:000001EA9C8CAC)

[ydcool]

hello, after read the code of this extension I made some change:

t.generateMultiLineCommand = async function (e, t, n) { 
const r = c(e); 
if (i.isWindows) { 
if (!process.env.TEMP) throw new Error("The TEMP environment variable must be set");
 const i = s.join(process.env.TEMP, `vscode-linux-multi-line-command-${e.hostName}.sh`);
 return new Promise(e => {
 o.writeFile(i, t, t => { if (t) throw new Error(`Failed to write install script to path ${i}. ${t.message}`);
//add -t -t here
 e(`type "${i}" | ${h()} -t -t ${u(n)} ${r}`) }) }) 
} 
return `${h()} -t -t ${await l(e)} ${u(n)} ${r} << 'EOSSH'\n${t}\nEOSSH`
 }

command generated:

type "C:\Users\DOM~1\AppData\Local\Temp\vscode-linux-multi-line-command-test.sh" | ssh -t -t  test

this command executed success in powershell, but got another error in this extension:

Confirming that test is a valid reachable host
Running [type "C:\Users\DOM~1\AppData\Local\Temp\vscode-linux-multi-line-command-test.sh" | ssh -t -t  test] to confirm the host platform
> 
> GetConsoleMode on STD_INPUT_HANDLE failed with 6
> 
> 
> Welcome to Ubuntu 16.04.5 LTS (GNU/Linux 4.4.0-131-generic x86_64)
> 
>  * Documentation:  https://help.ubuntu.com
>  * Management:     https://landscape.canonical.com
>  * Support:        https://ubuntu.com/advantage
> Last login: Sun May  5 16:23:50 2019 from 10.200.84.113
> uname -sm
> root@inserver-inspurclouddev-391-10:~# uname -sm

it looks like something wrong with openssh reported here: https://github.com/PowerShell/Win32-OpenSSH/issues/856

hope this information may helps.

[roblourens]

Do you know why the -t option fixes the IO is still pending on closed socket error?

[ydcool]

Do you know why the -t option fixes the IO is still pending on closed socket error?

Sorry I'm not sure.

here is the description of -t：

-t' Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g. when implementing menu services. Multiple -t options force tty allocation, even if ssh has no local tty.

[ydcool]

If I change the ssh client from openssh to the git ssh located at C:\\Progra~1\\Git\\usr\\bin\\ssh.exe then everything will be fine.

[xluos]

If I change the ssh client from openssh to the git ssh located at C:\\Progra~1\\Git\\usr\\bin\\ssh.exe then everything will be fine.

Can you tell me how to replace it? Thank you

[ydcool]

If I change the ssh client from openssh to the git ssh located at C:\\Progra~1\\Git\\usr\\bin\\ssh.exe then everything will be fine.

Can you tell me how to replace it? Thank you

Step 1: Find the remote ssh extension file, in general at C:\Users\<YOUR_NAME>\.vscode-insiders\extensions\ms-vscode-remote.remote-ssh-<CURRENT_VERSION>\out\extension.js.

Step 2: Open extension.js, search the function named getSshCommand , you may got about 3 matches, in front of the first one, you can find the function function h(){return d}.

Step 3: Modify the function h , change the return value to your ssh client path, for example,

function h(){
  return "C:\\Progra~1\\Git\\usr\\bin\\ssh.exe"
}

The last step before this trick works, just save and relaunch vscode or reload window with ctrl + shift + p. 👻

@xluos

[rachetfoot]

I also get this error with:
VSCode Version: 1.35.0-insider
Local OS Version: Windows 10 Build 1803
Remote OS Version: Linux Mint 19.1 (5.1.4-050104-generic)
Remote Extension/Connection Type: SSH

If I enable keeping the terminal open I see the welcome message and the uname result (Linux armv7l) before it closes.

[AllaeddineEL]

you can put your ssh client in your path environment variable instead of modifying the code

[ydcool]

you can put your ssh client in your path environment variable instead of modifying the code

I don't think so, as the source code shows, it will use open ssh for windows, without care about any environment variables.

[roblourens]

In the nightly version of the extension, we search for ssh in different locations and include a setting for you to set the path if needed. Try it out (uninstall the stable version first)

[vscodebot[bot]]

This issue has been closed automatically because it needs more information and has not had recent activity. See also our issue reporting guidelines.

Happy Coding!