Zombies are not uncommon to see for an app running in a container that forks off other processes. This isn't every program but forking processes is pretty comm

Zombies are not uncommon to see for an app running in a container that forks off other processes. This isn't every program but forking processes is pretty common, enough so to be worrisome. For instance, some programs watch the Docker event stream and can reload, say, HAproxy configuration to automatically load balance any new containers which come up. In my experience, running such a program in a container can make reloading the HAproxy process frequently tend to create a huge variety of zombie processes - and once they're present, zombies are difficult to eliminate without a reboot.