supervisord seems to go haywire under Upstart

Mon Mar 17 18:21:21 UTC 2014

This is an error having to do with a combination of Upstart and supervisor.
Upstart works fine on other services, and supervisor works great on its own.

When I start supervisor in the foreground, and start the job (without an
expect value), the operation blocks. When I start the supervisor process as
a daemon, it'll block with both "expect daemon" and "expect fork". I've
also tried "expect stop", for good measure.

When I try the instructions under "6.12.4 How to Establish Fork Count" (
http://upstart.ubuntu.com/cookbook/#expect) while using supervisor in
daemon mode, I get a massive number of clones up and until the process is
killed:

$ sudo egrep "\<(fork|clone)\>\(" /tmp/strace.log
18916 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7ffdae9799d0) = 18917
18917 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7fa9910d39d0) = 18918
18916 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7ffdae9799d0) = 18919
18919 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7ffdae9799d0) = 18920
18919 clone( <unfinished ...>
18919 clone( <unfinished ...>
18919 clone( <unfinished ...>
18919 clone( <unfinished ...>
18923 clone( <unfinished ...>
18925 clone( <unfinished ...>
18922 clone( <unfinished ...>
18926 clone( <unfinished ...>
18927 clone( <unfinished ...>
18929 clone( <unfinished ...>
18928 clone( <unfinished ...>
18930 clone( <unfinished ...>
18926 clone( <unfinished ...>
18929 clone( <unfinished ...>
18926 clone( <unfinished ...>
18929 clone( <unfinished ...>
18935 clone( <unfinished ...>
18936 clone( <unfinished ...>
18924 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7f3c797889d0) = 18939
18923 clone( <unfinished ...>
18939 clone( <unfinished ...>
18941 clone( <unfinished ...>
18922 clone( <unfinished ...>
18942 clone( <unfinished ...>
18941 clone( <unfinished ...>
18941 clone( <unfinished ...>
18946 clone( <unfinished ...>
18924 clone( <unfinished ...>
18923 clone( <unfinished ...>
18924 clone( <unfinished ...>
18922 clone( <unfinished ...>
18919 clone( <unfinished ...>
18919 clone( <unfinished ...>
18921 clone( <unfinished ...>
18954 clone( <unfinished ...>
18955 clone( <unfinished ...>
18956 clone( <unfinished ...>
18955 clone( <unfinished ...>
18955 clone( <unfinished ...>
18959 clone( <unfinished ...>
18953 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7f5871a0b9d0) = 18961
18961 clone( <unfinished ...>
18921 clone( <unfinished ...>
18962 clone( <unfinished ...>
18964 clone( <unfinished ...>
18962 clone( <unfinished ...>
18962 clone( <unfinished ...>
18967 clone( <unfinished ...>
18953 clone( <unfinished ...>
18921 clone( <unfinished ...>
18919 clone( <unfinished ...>
18953 clone( <unfinished ...>
18971 clone( <unfinished ...>
18973 clone( <unfinished ...>
18919 clone( <unfinished ...>
18974 clone( <unfinished ...>
18976 clone( <unfinished ...>
18975 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7f537bc059d0) = 18978
18974 clone( <unfinished ...>
18978 clone( <unfinished ...>
18980 clone( <unfinished ...>
18974 clone( <unfinished ...>
18982 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7fdf0db9f9d0) = 18983
18981 clone( <unfinished ...>
18980 clone( <unfinished ...>
18980 clone( <unfinished ...>
18971 clone( <unfinished ...>
18986 clone( <unfinished ...>
18975 clone( <unfinished ...>
18971 clone( <unfinished ...>
18975 clone( <unfinished ...>
18919 clone( <unfinished ...>
18992 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7f11233fd9d0) = 18993
18993 clone( <unfinished ...>
18994 clone( <unfinished ...>
18995 clone( <unfinished ...>
18994 clone( <unfinished ...>
18994 clone( <unfinished ...>
18998 clone( <unfinished ...>
18992 clone( <unfinished ...>
18920 clone( <unfinished ...>
19001 clone( <unfinished ...>
19002 clone( <unfinished ...>
19003 clone( <unfinished ...>
19002 clone( <unfinished ...>
19002 clone( <unfinished ...>
19006 clone( <unfinished ...>
18992 clone(child_stack=0x7f8e10847ff0,
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID,
parent_tidptr=0x7f8e108489d0, tls=0x7f8e10848700,
child_tidptr=0x7f8e108489d0) = 19008
18920 clone( <unfinished ...>
18919 clone( <unfinished ...>
18919 clone( <unfinished ...>
18919 clone( <unfinished ...>
19011 clone( <unfinished ...>
19013 clone( <unfinished ...>
19014 clone( <unfinished ...>
19015 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7f9d52dbe9d0) = 19016
19014 clone( <unfinished ...>
19014 clone( <unfinished ...>
19018 clone( <unfinished ...>
19011 clone( <unfinished ...>
19012 clone( <unfinished ...>
19021 clone( <unfinished ...>
19022 clone( <unfinished ...>
18919 clone( <unfinished ...>
19023 clone( <unfinished ...>
19022 clone( <unfinished ...>
19022 clone( <unfinished ...>
19027 clone( <unfinished ...>
19024 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7f8e219879d0) = 19029
19029 clone( <unfinished ...>
19030 clone( <unfinished ...>
19031 clone( <unfinished ...>
19012 clone( <unfinished ...>
19030 clone( <unfinished ...>
19030 clone( <unfinished ...>
19035 clone( <unfinished ...>
19024 clone( <unfinished ...>
19012 clone( <unfinished ...>
18919 clone( <unfinished ...>
19024 clone( <unfinished ...>
19011 clone( <unfinished ...>
19039 clone( <unfinished ...>
19042 clone( <unfinished ...>
19043 clone( <unfinished ...>
19044 clone( <unfinished ...>
19043 clone( <unfinished ...>
19043 clone( <unfinished ...>
19047 clone( <unfinished ...>
19039 clone( <unfinished ...>
19039 clone( <unfinished ...>
18920 clone( <unfinished ...>
18919 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7ffdae9799d0) = 19052
18919 clone( <unfinished ...>
19052 clone( <unfinished ...>
19054 clone( <unfinished ...>
19055 clone( <unfinished ...>
19056 clone( <unfinished ...>
19055 clone( <unfinished ...>
19055 clone( <unfinished ...>
19059 clone(child_stack=0,
flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7fb5c74439d0) = 19060
19052 clone( <unfinished ...>
19053 clone( <unfinished ...>
19062 clone( <unfinished ...>
19063 clone( <unfinished ...>
19064 clone( <unfinished ...>
19063 clone( <unfinished ...>
19063 clone( <unfinished ...>
19067 clone( <unfinished ...>
19052 clone( <unfinished ...>
19053 clone( <unfinished ...>
19053 clone( <unfinished ...>

Does anyone have any advice for what I'm missing?

Dustin
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