My problem is that from time to time, when I try to start a new container with docker run, it just hangs forever. All the running containers keep working fine, but I'm unable to start any container.
The only way of getting out of there is with Ctrl+C, but then I can't remove the failed container (nor the associated image, of course). What I've found so far is that the associated containerd-shim process keeps running, and when I term it (it responds to TERM, no need to KILL), then everything unstucks and if I tried and failed to remove the container, it's removed in that moment. I still can't create any new container with docker run though.
If I restart the docker service it stops happening... for a while. Of course this is less than ideal so I would like to find the root cause. I've been unable to find any containerd logs that can give me a clue of what's happening, so I'm here to see if someone had a similar problem and how he/she solved it or if someone with a deep knowledge of docker can give me a thread to pull.
I'm using docker engine v19.03.6 with containerd v1.4.4.
I'm not running out of memory. I've checked that.
