[Bug]: Failed to establish multiplexed connection, MacOS Docker Desktop

[dawnniie]

Error Message and Logs

Error message in notification:

Failed to establish multiplexed connection: muxserver_listen: link mux listener /var/www/html/storage/app/ssh/mux/mux_is8sw40k0k0ccog408cswkwo.T1frzHlQscP2Xaqj => /var/www/html/storage/app/ssh/mux/mux_is8sw40k0k0ccog408cswkwo: Bad file descriptor

The command for reference:

ssh -fNM -o ControlMaster=auto -o ControlPath=/var/www/html/storage/app/ssh/mux/mux_is8sw40k0k0ccog408cswkwo -o ControlPersist=3600 -i /var/www/html/storage/app/ssh/keys/ssh_key@wog4sww4ossskwos0c4o8kkg -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o PasswordAuthentication=no -o ConnectTimeout=10 -o ServerAliveInterval=20 -o RequestTTY=no -o LogLevel=ERROR -p 22 root@coolify-testing-host

And the last few lines of the -vvv ssh logs running that command (on a different attempt):

Authenticated to coolify-testing-host ([172.18.0.6]:22) using "publickey".
debug1: setting up multiplex master socket
debug3: muxserver_listen: temporary control path /var/www/html/storage/app/ssh/mux/mux_xs0k48okkgoow04gwww8s4ok.QaQBZPot0nlV5iEc
muxserver_listen: link mux listener /var/www/html/storage/app/ssh/mux/mux_xs0k48okkgoow04gwww8s4ok.QaQBZPot0nlV5iEc => /var/www/html/storage/app/ssh/mux/mux_xs0k48okkgoow04gwww8s4ok: Bad file descriptor

Steps to Reproduce

1. Follow the setup guide in Contributing step for step.
2. Navigate to a resource or validate the server, any action to create a remote process and trigger establishNewMultiplexedConnection
3. The error appears.
4. Try seeding with docker exec -it coolify php artisan migrate:fresh --seed, error is still reproducible immediately afterwards

Example Repository URL

No response

Coolify Version

v4.0.0-beta.361

Are you using Coolify Cloud?

No (self-hosted)

Operating System and Version (self-hosted)

MacOS 15.0.1 (24A348)

Additional Information

Using MacOS and Docker Desktop (4.33.0), issue occurs on both beta.361 and beta.360.

When troubleshooting the issue, I tried changing line 16 in SshMultiplexingHelper to use a different file location:

- $muxFilename = '/var/www/html/storage/app/ssh/mux/mux_'.$server->uuid;
+ $muxFilename = '/tmp/mux_'.$server->uuid;

That actually worked, so maybe this is a directory permissions issue oooor something to do with the bind mount?

[dawnniie]

Also, I tried setting SSH_MUX_ENABLED=false in my .env to get around it, but after I ran spin up again it kept trying to do multiplexed connections. Not sure if there's something I'm missing there.