[regression][macos] Restarting daemon while tray GUI is running can hang the daemon

[townsend2010]

A regression has been reported where restarting multipassd while the system tray GUI is running will cause the daemon to not respond to requests after it starts.

It has been narrowed down to this error in the log:

E0627 10:12:08.657058000 6136393728 tcp_server_posix.cc:245]           Failed getpeername: Invalid argument

gRPC seems to get in a bad way only on the Mac when this occurs. It seems this correlates with this change: canonical/grpc@447bd66

To work around this issue, please do the following:

% launchctl unload /Library/Application\ Support/com.canonical.multipass/Resources/com.canonical.multipass.gui.autostart.plist
% sudo launchctl unload /Library/LaunchDaemons/com.canonical.multipassd.plist
% sudo launchctl load -w /Library/LaunchDaemons/com.canonical.multipassd.plist

[samie]

Can't fully confirm, but this seems to correlate with the host machine network change. Even reboot does not help until I did sudo dscacheutil -flushcache.

[supersid1695]

@townsend2010 any workaround for this issue? @samie solution didn't actually work for me.

System: M1 Pro
OS: ventura 13.4.1

[townsend2010]

@supersid1695 Yes, you need to do what I posted in #3140 (comment).

I will add those instructions in this issue's description as well.

[huyz]

@townsend2010's workaround wasn't sufficient for me. I also had to do @samie's sudo dscacheutil -flushcache and multipass started working again for me.