Comment 5 for bug 1436414

Some more observations from a repro:

root@node-7:~# strace -p 7257
Process 7257 attached
wait4(7264, ^CProcess 7257 detached

pid 7257 - q-agent-cleanup
it waits for process 7264 which is ip netns list, which in turn hangs in writing to stdout:

root@node-7:~# strace -p 7264
Process 7264 attached
write(1, "p-81026552-158c-4343-b6e0-c541d5"..., 4096