engineyard/engineyard-serverside — pull request #101 by martinemde (2014-06-04 20:42:09+00:00)
Title: raise when waitpid2 returns non-nil that isn't a pid

This isn't something that should ever happen.
I can't reproduce it locally, nor can I find documentation showing
any other response other than a pid in ruby or unix/linux docs.
Nevertheless, it is occurring on at least one customer instance,
so hopefully the error output here will help us track it down.