The problem here is websockify throws a python stracktrace everytime we try to connect to occupied port. And this is how Foreman works - it loops the ports until websockify starts ok. The problem is that python on RHEL6 is configured with ABRT integration by default, therefore every single try causes ABRT run, which is also quite slow.

I was not able to blacklist websockify, after some discussion with ABRT folks, I have decided this trick to mute that guy. The process is not able to connect to ABRT.