Vscode-remote-release: Remote - SSH extension try to map local port zero
Issue Type: Bug
connect to a remote host specified from ~/.ssh/config
the connection stopped with message "Could not establish connection to "xxx". Illegal argument: port".
With the full log in "OUTPUT" window, I can see the extension try to map remote port 42007 to local port 0, while port 0 is invalid.
SSH Resolver called for "ssh-remote+aliyun"
SSH Resolver called for host: aliyun
Setting up SSH remote "aliyun"
Using commit id "473af338e1bd9ad4d9853933da1cd9d5d9e07dc9" and quality "insider" for server
Install and start server if needed
Welcome to Ubuntu 16.04.4 LTS (GNU/Linux 4.4.0-117-generic x86_64)
Documentation: https://help.ubuntu.com
Management: https://landscape.canonical.com
Support: https://ubuntu.com/advantage
New release '18.04.2 LTS' available.
Run 'do-release-upgrade' to upgrade to it.
Welcome to Alibaba Cloud Elastic Compute Service !
mesg: ttyname failed: Inappropriate ioctl for device
bash: cannot set terminal process group (7824): Inappropriate ioctl for device
bash: no job control in this shell
Found existing installation...
mesg: ttyname failed: Inappropriate ioctl for device
Found running server...
Reminder: You may only use this software with Visual Studio family products,
as described in the license (https://go.microsoft.com/fwlink/?linkid=2077057)
ebaaff07-47c7-4d23-ad0e-65c0dd7d2fc6==42007==
"install" terminal command done
Received install output: ebaaff07-47c7-4d23-ad0e-65c0dd7d2fc6==42007==
Server is listening on port 42007
Spawning tunnel with: ssh aliyun -N -L localhost:0:localhost:42007
Spawned SSH tunnel between local port 0 and remote port 42007
Waiting for ssh tunnel to be ready
Tunneling remote port 42007 to local port 0
Resolving "ssh-remote+aliyun" to "localhost:0", attempt: 1
Illegal argument: port
Tunnel(42007) stderr: Bad local forwarding specification 'localhost:0:localhost:42007
VS Code version: Code - Insiders 1.34.0-insider (473af33, 2019-05-01T00:21:48.884Z)
OS version: Darwin x64 18.2.0
Fetching remote diagnostics for 'SSH: aliyun' failed: Illegal argument: port
System Info
Extensions: none
AlexBu
All 12 comments
Seems that finding a free port failed for some reason.
roblourens
on 8 May 2019
The extension works correctly after a reboot on my MBP
AlexBu
on 8 May 2019
I will keep this open because we can handle this better...
roblourens
on 9 May 2019
Hit this today, also on a MBP, and reboot fixed it.
harrism
on 26 Jun 2019
I have this issue on Windows 10, rebooting doesn't help. Running the SSH Nightly also didn't help, but hid the error (but it still froze)
Server is listening on port 42444
Spawning tunnel with: ssh -t "vm" -L localhost:0:localhost:42444 "echo -e 'Connected to SSH Host - Please do not close this terminal' && sleep infinity"
Spawned SSH tunnel between local port 0 and remote port 42444
Still seems to be trying to bind to port 0. I tried completely removing VS Code and all extensions and user settings in %appdata%\Code
sebmaynard
on 3 Jul 2019
I have the same problem in Windows 10.
"install" terminal command done
Received install output: 86ca28b4-a596-4ef8-ad23-a4ba3d6f5877==45403==37835==
Server is listening on port 45403
Using SSH config file "C:\Users\allan\.ssh\config"
Running script with connection command: "ssh" -L 127.0.0.1:0:127.0.0.1:45403 -F C:\Users\allan\.ssh\config
xueyaodeai
on 17 Jul 2019
I just started receiving this error yesterday, also Windows 10. I tried the insiders and the SSH nightly and still had the issue.
Are there any workarounds at this time?
Dallas-Hays
on 17 Jul 2019
I have tried to improve the error handling here and make this less likely, but I'm not sure why we are failing to find a free port. If you still see it in the nightly build after next monday, please show me your logs.
roblourens
on 19 Jul 2019
Hello, thanks for taking a look at this.
I’ve tried the nightly build you mentioned and I’m still seeing the error. Previously it looked like the other posters (specifically xueyaodeai's post). Now it pops up a window that says
Could not establish connection to “dev-centos7”. Error establishing tunnel (Failed to find a free local port).
and gives the option to close the remote or retry.
I am running Windows 10, the VSCode Insiders build, and the only extensions are the three that come with Remote – SSH.
Let me know if you need more information. Here are the Remote – SSH logs and my system info:
[19:37:13.327] [email protected]
[19:37:13.327] win32 x64
[19:37:13.327] SSH Resolver called for "ssh-remote+dev-centos7", attempt 1
[19:37:13.327] SSH Resolver called for host: dev-centos7
[19:37:13.328] Setting up SSH remote "dev-centos7"
[19:37:13.332] Using commit id "81ed55af79f01e9e64c3438558d2c2233e382a5a" and quality "insider" for server
[19:37:13.335] Testing ssh with ssh -V
[19:37:13.426] ssh exited with code: 0
[19:37:13.426] Got stderr from ssh: OpenSSH_for_Windows_7.6p1, LibreSSL 2.6.4
[19:37:13.426] Running script with connection command: ssh -o ClearAllForwardings=true dev-centos7 bash
[19:37:13.432] Install and start server if needed
[19:37:13.603] >
[19:37:13.603] Got some output, clearing connection timeout
[19:37:14.065] > Running remote connection script
>
[19:37:14.091] > Acquiring lock on /root/.vscode-server-insiders/bin/81ed55af79f01e9e64c3438558d2
> c2233e382a5a/vscode-remote-lock.81ed55af79f01e9e64c3438558d2c2233e382a5a
> Found existing installation at /root/.vscode-server-insiders/bin/81ed55af79f01e9
> e64c3438558d2c2233e382a5a...
>
[19:37:14.155] > XDG_SESSION_ID=712
> SELINUX_ROLE_REQUESTED=
> SHELL=/bin/bash
> SSH_CLIENT=<my_ip_address> 61848 22
> SELINUX_USE_CURRENT_RANGE=
> USER=root
> VSCODE_AGENT_FOLDER=/root/.vscode-server-insiders
> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
> MAIL=/var/mail/root
> PWD=/root
> LANG=en_US.UTF-8
> SELINUX_LEVEL_REQUESTED=
> HOME=/root
> SHLVL=2
> LOGNAME=root
> SSH_CONNECTION=<my_ip_address> 61848 <remote_ip_address> 22
> XDG_DATA_DIRS=/root/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/
> share:/usr/local/share:/usr/share
> LESSOPEN=||/usr/bin/lesspipe.sh %s
> XDG_RUNTIME_DIR=/run/user/0
> _=/usr/bin/printenv
> Starting server...
> Waiting for server log...
>
[19:37:14.651] >
> *
> * Reminder: You may only use this software with Visual Studio family products,
> * as described in the license (https://go.microsoft.com/fwlink/?linkid=2077057)
> *
>
> dab93d0b-4f33-4565-a0d1-c90079436fc9==45013==42592==
>
[19:37:14.652] Received install output: dab93d0b-4f33-4565-a0d1-c90079436fc9==45013==42592==
[19:37:14.652] Remote server is listening on port 45013
[19:37:14.941] "install" terminal command done
[19:37:17.654] Error establishing tunnel (Failed to find a free local port).
[19:37:17.654] Error establishing tunnel (Failed to find a free local port).
[19:37:17.654] ------
CPUs | Intel(R) Xeon(R) Gold 6128 CPU @ 3.40GHz (12 x 3392)
-- | --
GPU Status | 2d_canvas: enabledflash_3d: enabledflash_stage3d: enabledflash_stage3d_baseline: enabledgpu_compositing: enabledmultiple_raster_threads: enabled_onnative_gpu_memory_buffers: disabled_softwareoop_rasterization: disabled_offprotected_video_decode: unavailable_offrasterization: enabledskia_deferred_display_list: disabled_offskia_renderer: disabled_offsurface_synchronization: enabled_onvideo_decode: enabledviz_display_compositor: disabled_offwebgl: enabledwebgl2: enabled
Load (avg) | undefined
Memory (System) | 63.63GB (52.56GB free)
Process Argv |
Screen Reader | no
VM | 0%
Dallas-Hays
on 22 Jul 2019
Thanks for trying. I have changed the strategy for picking a free port, so maybe it will work in tomorrow's nightly build.
roblourens
on 23 Jul 2019
Just tested the new build [email protected] and I'm still having issues, logs are below. I think that your recent change may have fixed the issue though and instead I'm having another problem.
There was an issue posted a couple of days ago that looks identical to what I'm seeing below: #1019 , the difference being they were running on the current release build 0.44.2. and I was on the nightly. Perhaps my logs will give a little more insight into their issue as well.
[15:00:07.169] [email protected]
[15:00:07.169] win32 x64
[15:00:07.170] SSH Resolver called for "ssh-remote+dev-centos7", attempt 1
[15:00:07.170] SSH Resolver called for host: dev-centos7
[15:00:07.170] Setting up SSH remote "dev-centos7"
[15:00:07.187] Using commit id "6d82826e990407364d5c829b73602a19ecdf7d00" and quality "insider" for server
[15:00:07.190] Testing ssh with ssh -V
[15:00:07.275] ssh exited with code: 0
[15:00:07.275] Got stderr from ssh: OpenSSH_for_Windows_7.6p1, LibreSSL 2.6.4
[15:00:07.276] Running script with connection command: ssh -o ClearAllForwardings=true dev-centos7 bash
[15:00:07.280] Install and start server if needed
[15:00:07.557] >
[15:00:07.557] Got some output, clearing connection timeout
[15:00:07.898] > Running remote connection script
> Acquiring lock on /root/.vscode-server-insiders/bin/6d82826e990407364d5c829b7360
> 2a19ecdf7d00/vscode-remote-lock.6d82826e990407364d5c829b73602a19ecdf7d00
> Migrating .vscode-remote to /root/.vscode-server-insiders...
>
[15:00:07.934] > Installing to /root/.vscode-server-insiders/bin/6d82826e990407364d5c829b73602a19
> ecdf7d00...
> Downloading with wget
>
[15:00:23.248] > Download complete
>
[15:00:23.932] > XDG_SESSION_ID=1387
> SELINUX_ROLE_REQUESTED=
> SHELL=/bin/bash
> SSH_CLIENT=<my_ip_address> 55126 22
> SELINUX_USE_CURRENT_RANGE=
> USER=root
> VSCODE_AGENT_FOLDER=/root/.vscode-server-insiders
> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
> MAIL=/var/mail/root
> PWD=/root
> LANG=en_US.UTF-8
> SELINUX_LEVEL_REQUESTED=
> HOME=/root
> SHLVL=2
> LOGNAME=root
> SSH_CONNECTION=<my_ip_address> 55126 <remote_ip_address> 22
> XDG_DATA_DIRS=/root/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/
> share:/usr/local/share:/usr/share
> LESSOPEN=||/usr/bin/lesspipe.sh %s
> XDG_RUNTIME_DIR=/run/user/0
> _=/usr/bin/printenv
> OLDPWD=/root/.vscode-server-insiders/bin/6d82826e990407364d5c829b73602a19ecdf7d0
> 0
> Starting server...
> Waiting for server log...
>
[15:00:24.430] >
> *
> * Reminder: You may only use this software with Visual Studio family products,
> * as described in the license (https://go.microsoft.com/fwlink/?linkid=2077057
)
> *
>
>
[15:00:24.466] > 58ca5e3a-8d30-4935-b67a-98422db7e04d==40480==36394=="centos"==
>
[15:00:24.718] "install" terminal command done
[15:00:24.719] Install terminal quit with output: 58ca5e3a-8d30-4935-b67a-98422db7e04d==40480==36394=="centos"==
[15:00:24.719] Received install output: 58ca5e3a-8d30-4935-b67a-98422db7e04d==40480==36394=="centos"==
[15:00:24.719] Failed to parse remote port from server output: 58ca5e3a-8d30-4935-b67a-98422db7e04d==40480==36394=="centos"==
[15:00:24.719]
[15:00:24.720] TELEMETRY: {"eventName":"resolver","properties":{"outcome":"failure","reason":"UnparsableOutput"},"measures":{"resolveAttempts":1,"retries":1}}
[15:00:24.721] ------
Thanks @Dallas-Hays I will open a new issue for this part
roblourens
on 26 Jul 2019
Related issues
6XAM
·
3Comments
jeffreyyjp
·
3Comments
gurdevrana
·
3Comments
kieferrm
·
3Comments
asyncx
·
3Comments
Most helpful comment
I have this issue on Windows 10, rebooting doesn't help. Running the SSH Nightly also didn't help, but hid the error (but it still froze)
Still seems to be trying to bind to port 0. I tried completely removing VS Code and all extensions and user settings in %appdata%\Code