ssh disconnections

[jjarokergc]

Type: Bug

Latest version was installed last night via snap. Now I cannot connect to any remote host via the Remote Development module. SSH connects successfully, according to sshd logs on the remote. But VScode disconnects from the remote. There are no error message on the remote sshd log that would indicate any reason for the disconnection.

This happens on all 3 remote hosts that I typically develop on. Before the snap update, these connections worked fine.

I needed to revert to the previous version to regain remote development:

jjaroker@puma:~$ snap list code --all
Name  Version   Rev  Tracking       Publisher  Notes
code  6c3e3dba  137  latest/stable  vscode✓    classic
code  8b617bd0  138  latest/stable  vscode✓    disabled,classic

VS Code version: Code 1.82.0 (8b617bd, 2023-09-06T22:07:18.759Z)
OS version: Linux x64 5.15.0-83-generic snap
Modes:
Connection to 'SSH: puppet.staging' could not be established Canceled

System Info

Item	Value
CPUs	Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz (32 x 1200)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	1, 1, 0
Memory (System)	125.79GB (122.92GB free)
Process Argv	--no-sandbox --force-user-env --unity-launch
Screen Reader	no
VM	0%
DESKTOP_SESSION	plasma
XDG_CURRENT_DESKTOP	KDE
XDG_SESSION_DESKTOP	KDE
XDG_SESSION_TYPE	x11

Connection to 'SSH: puppet.staging' could not be established Canceled

Extensions: none

[binnn6]

Same problem, fixed by switch "Remote - SSH" extension to Pre-Release Version.

[shangbinbin]

Same problem, fixed by switch "Remote - SSH" extension to Pre-Release Version.

👍it works for me.

[mcognetta]

I had a similar problem and the ssh connection would hang with the message

Failed to set up socket for dynamic port forward to remote port ...:

I was able to ssh successfully from my terminal, but not from VSCode. I rolled back the remote ssh extension to a few different versions, but eventually that worked.

I first tried the prelease version, but that didn't work. I had to roll it back two versions before it worked.

[connor4312]

I would be grateful if you could grab the "Remote - SSH" log from the "Output" tab in the bottom panel of VS Code when you get into this broken state. Note that we've turned off the problematic functionality in stable for the moment, but it can be turned back on via the "remote.SSH.useExecServer": true setting. Please turn that on for a few minutes and see if you can still get the failure. Thanks!

[webjema]

I have the same issue. Please find logs attached.
Issue is fixed switching to pre-release extension.

VScode_SSH_Log_Level.txt

[connor4312]

@webjema your issue is the same as microsoft/vscode-remote-release#8942 (comment) which will be fixed when you update to the latest extension version (0.106.3)

[jjarokergc]

Hello @connor4312

I attempted to get the additional information you requested, but there is no output generated.

Here is my environment:

jjaroker@puma:~$ snap list code --all
Name  Version   Rev  Tracking       Publisher  Notes
code  6c3e3dba  137  latest/stable  vscode✓    disabled,classic
code  65091741  139  latest/stable  vscode✓    classic

Enabling the option "Remote.SSH:Use ExecServer" and then making a remote connection resulted in several loops of "Downloading VS Code..." and finally an error "Could not fetch remote environment".

Here is a screenshot of what I observe. The Output tab is blank.

[connor4312]

Hi, you'll want to use the select box in the upper right side of the bottom panel and switch to "Remote - SSH". That should have the output. Thanks!

[jjarokergc]

Sorry about that.

Attached are files from the ssh remote output and the error messages that appear on vscode console.

sshremote.log
vscode-app-1694631240522.log
vscode-app-1694631415189.log

[corford]

Enabling "remote.SSH.useExecServer": true fixed it for me (before I was getting "Error opening exec server" when trying to launch a dev container via a remote SSH workspace

[ciricc]

Enabling "remote.SSH.useExecServer": true fixed it for me (before I was getting "Error opening exec server" when trying to launch a dev container via a remote SSH workspace

Me too. Helped to fix reopening in the dev container command execution.

[connor4312]

THat is tracked in microsoft/vscode-remote-release#9064, release will be out shortly

[VSCodeTriageBot]

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!