been spawning 10k containers in a bash loop (command was just top), at around 2.5k I got:

2015/12/18 10:39:39 grpc: Server.processUnaryRPC failed to write status: connection error: desc = "transport: write unix /run/containerd/containerd.sock->@: write: bad file descriptor"

containerd crashed, containers list is empty after the crash, don't know if it's related to the code or to my system