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Docker defunct process

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goose_ws
Posts: 1
Joined: 2022-09-09 13:20

Docker defunct process

#1 Post by goose_ws »

System info:

Debian 11 x86_64 with PVE kernel 5.15.53-1 (Proxmox kernel, installed Proxmox after/on-top-of Debian)
Docker version 20.10.5+dfsg1, build 55c4c88

I'm having a sporadic issue where once every 1-2 weeks Docker will become unresponsive. I can still ssh into the system just fine and checking ps shows that the dockerd daemon is running. I can even see my containers via docker ps and such. But I can't actually access the containers. If I attempt to sudo service docker stop, the command just hangs until I do Ctrl+C. A follow up ps shows that dockerd is now defunct. I'm unable to kill or kill -9 the child or parent processes. If I try to reboot the system hangs on shutdown, I assume because it can't kill docker. The only way I can fix it is to physically hold down the power button and do a shutdown/restart that way.

I can't find any clues as to why this is happening. It most recently happened around 3:15 this morning (That's when Tautulli reported that my Plex container was down, so within 2 minutes of 3:15), but when I check /var/log/syslog, journalctl -fu docker.service, journalctl -xe, and systemctl status docker.service, none of them appear to show anything relevant within 5 minutes of that time period.

Any idea where I can look to try and prevent this from happening? It's been going on a month or two now.

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