Docker container refuses to get killed after run command turns into a zombie

Question

first thing first. my system info and versions:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 13.04
Release:           


        

Answer 1

Observing not killable Docker container on SLES 12 SP 1 (was running since 3 weeks)

On docker exec -it command following error message:

rpc error: code = 13 desc = invalid header field value "oci runtime error: exec failed: container_linux.go:247: starting container process caused \"process_linux.go:83: executing setns process caused \\"exit status 16\\"\"\n"

Linux kernel: 3.12.62-60.64.8-default

Docker version 1.12.2, build 8eab29e