Yeah by user space I just meant without root, sorry. HQ runs on supercomputers where the environment is heavily locked up, even Docker doesn't work. I think that PID namespaces aren't really possible, but I haven't tried it yet.
Subreaper doesn't help, because if the worker dies, the children aren't killed, even if they are the children of the worker, they will be just reparented to init.
Subreaper doesn't help, because if the worker dies, the children aren't killed, even if they are the children of the worker, they will be just reparented to init.