Upstart job hangs at "start/killed"

Binary package hint: upstart

I have the following upstart job:

$ cat /etc/init/freenet.conf
start on runlevel 2
chdir /mnt/datanr/freenet
exec sudo -u freenet ./run.sh start
nice 5
expect daemon

Upstart starts it during boot, but is unable to stop it.

$ sudo status freenet
freenet start/killed, process 2444

Process with pid 2444 does not exist, I guess there are too many forks.

I'll try using "su" instead of "sudo", but cannot change/start nor stop the process really.

$ status freenet
freenet start/killed, process 2444
$ sudo stop freenet
^C
$ status freenet
freenet stop/killed, process 2444
$ sudo stop freenet
stop: Job has already been stopped: freenet

All the time, there's no process 2444.

I'm attaching straces of the hanging start and stop actions, and a core dump.

ProblemType: Bug
Architecture: i386
Date: Mon Sep 28 20:26:28 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: upstart 0.6.3-5
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
SourcePackage: upstart
Uname: Linux 2.6.31-11-generic i686