[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Changed in: upstart (Debian) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to irqbalance in Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Changed in: upstart (Debian) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Also affects: irqbalance (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to irqbalance in Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Also affects: irqbalance (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Nice tip MarcS. That is indeed better than the other workarounds.
Here, a quick script -- cleanup-upstart.sh -- that checks initctl list
for stalled processes and kills them:
#!/bin/sh
# vim: set ts=8 sw=4 sts=4 et ai tw=71:
upstart_spawn_and_stop() {
name=$1
pid=$2
pkill -xf 'sleep 11' echo killed old sleep process
echo $((pid-2)) |
sudo tee /proc/sys/kernel/ns_last_pid /dev/null
sh -c 'sleep 11 '
sleeppid=`pgrep -xf 'sleep 11'`
if test $sleeppid != $pid; then
echo looks like we did not get the right pid..
return 1
fi
parentpid=`ps -o%P -p$pid | sed -e1d`
if test $parentpid -eq 1; then
echo very well.. we've got a live pid
else
echo looks like it got the wrong parent.. started from X?
return 1
fi
return 0
}
pkill -xf 'sleep 11' echo killed old sleep process
initctl list | tac | while read line; do
procpid=`echo $line | awk '{print $4}'`
if ! test -d /proc/$procpid; then
procname=`echo $line | awk '{print $1}'`
echo $procname:
if upstart_spawn_and_stop $procname $procpid; then
initctl status $name
initctl stop $name # Terminated?
fi
fi
done
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init: job stuck with expect fork/daemon when parent reaps child
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[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
And I'm happy to say that things are moving to systemd. My cron.conf now looks #44 just so cron gets the right locale in 14.04. I'm baffled that that's the best I can come up with with upstart. If there is a better way, please enlighten me. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
No, just look at the script stanzas used in the statd.conf or winbind.conf as an example. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
This makes it impossible to use upstart with any daemon where you want to source settings from /etc/default (using a script stanza). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I ran into this again and found a new (?) way of fixing the situation once it has happened that is slightly less crazy than the exhaust-all- pids script: The /proc/sys/kernel/ns_last_pid knob can be used to get a process with the correct PID. I used echo $(($n-2)) | sudo tee /proc/sys/kernel/ns_last_pid bash -c 'sleep 60 ' Where $n is the PID that upstart is tracking (output of 'status'). The -2 is necessary because the bash process gets a pid first. The sleep should wind up with the tracked PID and as a child of the init process. Maybe there is a simpler way, but this worked for me. Note that is a relatively new kernel feature. It works with the saucy kernel, I don't know about earlier releases. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
holy cow, 2014 and this issue is not solved yet. I just got bitten by it too. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
This issue also seems to be the cause of difficulties with minidlna if
the -R flag is added to rescan the media files directory because
minidlnad creates an additional process to do the rescanning. So if
expect daemon is used for the two process at startup, then the shutdown
runs into difficulties because there is only one process to be killed,
the rescan process having ended by itself.
So until a fix is found for upstart, users should be advised not to add
-R for rescan to the upstart configuration file, and that if they need
to do a rescan at startup, use the traditional sysV rc init.d script
and not upstart to start and stop the daemon.
It would also be very useful if there was some initctl command to wipe that
state of service jobs which are in a bad state eg
minidlna stop/killed, process 5114 or minidlna start/killed, process 5114
since once the upstart job gets into this state, using start or stop results in
upstart hanging on
connect(3, {sa_family=AF_FILE, path=@/com/ubuntu/upstart}, 22) = 0
fcntl64(3, F_GETFL) = 0x2 (flags O_RDWR)
fcntl64(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
geteuid32() = 0
getsockname(3, {sa_family=AF_FILE, NULL}, [2]) = 0
poll([{fd=3, events=POLLOUT}], 1, 0)= 1 ([{fd=3, revents=POLLOUT}])
send(3, \0, 1, MSG_NOSIGNAL) = 1
send(3, AUTH EXTERNAL 30\r\n, 18, MSG_NOSIGNAL) = 18
poll([{fd=3, events=POLLIN}], 1, -1)= 1 ([{fd=3, revents=POLLIN}])
read(3, OK 37d274edad794a392790c969525d3..., 2048) = 37
poll([{fd=3, events=POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
send(3, NEGOTIATE_UNIX_FD\r\n, 19, MSG_NOSIGNAL) = 19
poll([{fd=3, events=POLLIN}], 1, -1)= 1 ([{fd=3, revents=POLLIN}])
read(3, AGREE_UNIX_FD\r\n, 2048) = 15
poll([{fd=3, events=POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
send(3, BEGIN\r\n, 7, MSG_NOSIGNAL) = 7
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
sendmsg(3, {msg_name(0)=NULL,
msg_iov(2)=[{l\1\2\1\r\0\0\0\1\0\0\0_\0\0\0\1\1o\0\23\0\0\0/com/ubu..., 112},
{\10\0\0\0minidlna\0, 13}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) =
125
clock_gettime(CLOCK_MONOTONIC, {13369, 479497006}) = 0
poll([{fd=3, events=POLLIN}], 1, 25000) = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name(0)=NULL,
msg_iov(1)=[{l\2\1\1\0\0\0\1\0\0\0\17\0\0\0\5\1u\0\1\0\0\0\10\1g\0\1o\0\0...,
2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 70
recvmsg(3, 0xbfd42610, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily
unavailable)
sendmsg(3, {msg_name(0)=NULL,
msg_iov(2)=[{l\1\2\1\4\0\0\0\2\0\0\0x\0\0\0\1\1o\0!\0\0\0/com/ubu..., 136},
{\0\0\0\0, 4}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 140
clock_gettime(CLOCK_MONOTONIC, {13369, 504154425}) = 0
poll([{fd=3, events=POLLIN}], 1, 25000) = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name(0)=NULL,
msg_iov(1)=[{l\2\1\1(\0\0\0\2\0\0\0\17\0\0\0\5\1u\0\2\0\0\0\10\1g\0\1o\0\0...,
2048}], msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 72
recvmsg(3, 0xbfd425d0, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily
unavailable)
sendmsg(3, {msg_name(0)=NULL,
msg_iov(2)=[{l\1\2\1\10\0\0\0\3\0\0\0q\0\0\0\1\1o\0!\0\0\0/com/ubu..., 136},
{\0\0\0\0\1\0\0\0, 8}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 144
clock_gettime(CLOCK_MONOTONIC, {13369, 509531849}) = 0
poll([{fd=3, events=POLLIN}], 1, -1)= 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name(0)=NULL,
msg_iov(1)=[{l\4\1\1\t\0\0\0\3\0\0\0w\0\0\0\1\1o\0#\0\0\0/com/ubu..., 2048}],
msg_controllen=0, msg_flags=MSG_CMSG_CLOEXEC}, MSG_CMSG_CLOEXEC) = 145
recvmsg(3, 0xbfd42700, MSG_CMSG_CLOEXEC) = -1 EAGAIN (Resource temporarily
unavailable)
clock_gettime(CLOCK_MONOTONIC, {13369, 516260329}) = 0
poll([{fd=3, events=POLLIN}], 1, -7)= ? ERESTART_RESTARTBLOCK (To be
restarted)
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Title:
init: job stuck with expect fork/daemon when parent reaps child
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[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Changed in: upstart Assignee: (unassigned) = James Hunt (jamesodhunt) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I had a problem with john miller's bash script because bash didn't die quickly enough for the microsleep to get re-parented by init (upstart), so here is a better version: #!/bin/bash usleep 1 firstPID=$! #first lets exhaust the space while (( $! = $firstPID )) do usleep 1 done # [ will use testPID itself, we want to use the next pid declare -i testPID testPID=$(($1 - 1)) while (( $! $testPID )) do usleep 1 done # fork a background process then die so init reaps its pid sleep 3 echo Init will reap PID=$! kill -9 $$ # EOF Example usage: # sh /tmp/upstart_fix.sh 19915 Init will reap PID=19915 Killed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I use it with respawn with out an issue just make sure you kill everything/clean up in post-stop. I do the same kill/cleanup in pre- start just to be sure. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
John Miller: THANK YOU!!! Only thing is I'm not sure if this is compatible with respawn -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Changed in: upstart (Debian) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I came up with a hack to use upstart with applications that fork more
than twice to use until the rewrite makes it downstream. It works for my
application on my system. YMMV.
1.start the application in the pre-start section
2.in the script section run a script that runs as long as the application
runs. The pid of this script is what upstart will track.
3.in the post-stop section kill the application
example
env DAEMON=/usr/bin/forky-application
pre-start script
su -s /bin/sh -c $DAEMON joeuseraccount
end script
script
sleepWhileAppIsUp(){
while pidof $1 /dev/null; do
sleep 1
done
}
sleepWhileAppIsUp $DAEMON
end script
post-stop script
if pidof $DAEMON;
then
kill `pidof $DAEMON`
#pkill $DAEMON # post-stop process (19300) terminated with status 1
fi
end script
a similar approach could be taken with pid files.
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init: job stuck with expect fork/daemon when parent reaps child
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[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Could upstart track an arbitrary number of forks? instead of limiting to 1 (expect fork) or 2 (expect daemon) could expect N be supported? Also here is a bash script to exhaust the pid space if your system does not have ruby. pass the pid upstart is waiting for as an argument like this exhaustPIDspace.sh 11920 #!/bin/bash usleep 1 firstPID=$! #first lets exhaust the space while [ $! -ge $firstPID ] do usleep 1 done while [ $! -le $1 ] do usleep 1 done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
It seems to me that upstart could forget about a pid if it can verify that it has in fact disappeared. I've seen quite a few people bit by this bug in #upstart on Freenode and on various forum sites. Because I think the impact is perhaps higher than we might have originally anticipated, I'd suggest that upstart devs raise the priority to High. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** No longer affects: aiccu (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Bug watch added: Debian Bug tracker #582745 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=582745 ** Also affects: upstart (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=582745 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Changed in: upstart (Debian) Status: Unknown = New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Given that the PID would be killed pretty much as soon as it started and that you're most likely to trigger this while writing an unstart job for a daemon, I'd agree that the potential for serious problems is low. However, I don't think this is a user error/mistake, some daemons are just more awkward than others, may require scripts, etc., I don't think it's reasonable to expect every daemon out there to be re-written to play well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
oh, i see... this idea was turned down. sorry. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Yeah, as Scott already mentioned, pidfiles introduce their own set of problems, but also they aren't a solution for all use cases. E.g. the daemon I was dealing with does not have any way to write out a pidfile, forks multiple times, requires a script to do some setup before it's launched, and is a third party and closed source, so I can't do anything about this mess ;) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
While implementing a new upstart script, i also ran into this problem, and am now stuck with a job waiting for a non-existing pid. I think the worst-case scenario has not been mentioned yet, which is that when the actual pid does appear, it will be killed by this job thinking it is the process it has been waiting to kill. This could be a harmless process (or even created for that purpose by a script mentioned above), but it could also be a critical process. Thus the bug is less harmless than it appears to be. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
According to Mark Hurenkamp's comment, severity of this bug should be set to Critical. Image your very important app got the same PID as non-existent process had. Then Upstart: - causes data corruption - imagine you are editing your photos and something kills your application during rewrite of a photo - severely affects applications beyond the package responsible for the root cause - any application can be killed (crashing) randomly -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Peter, I understand that this is a dangerous bug. However, it is quite detectable when a user has made the mistake, and avoidable by taking care when creating new jobs. So I think Medium is appropriate, as there are workarounds, and the potential for these problems is quite low. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Scott, would it be possible to add the thing that David Ressman suggested, please? Something to manually reset a job state without restarting the machine. I'm a newbie to upstart and this bug is really annoying as it requires me to restart my machine when I write the conf in a wrong way... Makes debugging a nightmare. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Likewise to using a script stanza, this is also a problem when a script that actually starts a daemon is specified in `exec'. Although it wouldn't help with the original problem (avahi-deamon), for scripts a workaround/fix could be if you could tell upstart the name of the final executable, so it could ignore forks that exec another executable. Don't know if that's feasible? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Changed in: aiccu (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I think I'm running into this bug on an Ubuntu Lucid server. I tried to install the rsyslog package on this server, but the start / stop / restart functions would never complete (hangs forever). In the end, I had to abandon rsyslog and go back to sysklogd — bad solution, I need rsyslog, but I obviously don't have a choice if it simply won't work. There are a bunch of other packages on this same server which use upstart-job as their init scripts; they seem to work OK as far as I'm aware, but the fact that rsyslog won't work makes me nervous. Lucid is supposed to be an LTS release with support until 2015 (server edition), but is that fact going to help me in practice (i.e., is upstart ever going to be fixed for Lucid)? If I were to decide to upgrade this server to Maverick, is there any realistic reason to suppose that would help? Should I simply scrounge around for an old-style init script for rsyslog to run on this server? Is there some other solution I should be looking at? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child To manage notifications about this bug go to: https://bugs.launchpad.net/upstart/+bug/406397/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Out of curiosity, why can't a piece be written into init that allows one to manually remove processes from the state table? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Thanks Guido Scalise. That fixed it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
If I notice a start/killed or stop/killed job, is there any way to get rid of it other than rebooting the machine? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Anand, there's a rather harsh workaround using a ruby script you can download here: http://heh.fi/tmp/workaround-upstart-snafu It worked for me, but, as I said, the approach is quite aggressive. Basically it forks new dummy, short-lived, processes until the PID sequence restarts. Then, when one of these subprocesses gets the blocked PID, it waits until upstart kills it, thus unlocking the job's state. I didn't see any side effects, but YMMV. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I personally think being different from everyone else is a problem. Also, this is the sort of bug that should be architecturally impossible in an init system. init shouldn't have to track state perfectly to function on the basic level of 'start jobs' 'stop jobs'. I understand there are benefits for workstations with this (boot speed etc), but for a server upstart is notably less good than old-school init - even without the bugs, it's still very opaque - what with its lack of logging etc. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Thanks for your help Clint. Is Ubuntu still intending to stick with upstart in future releases? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
This specific issue will be fixed in a future release of Upstart with robust fork tracking. Is there a specific reason to switch? It’s not as if there are better alternatives out there. :-) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Tim, I'm sorry that you're experiencing the issue. I believe that squid may have always had this issue and we only stirred it up by updating squid. There is a really scary workaround available which is to create a program that exhausts the pid-space until tracked pid exists again, and then upstart will be able to re-attach and kill it... http://heh.fi/tmp/workaround-upstart-snafu I do think that we may need something a little less perfect than a full rewrite of the ptrace tracker that we could possibly backport to lucid. There seems to be a missing command that would allow an administrator to tell upstart to just forget about an instance. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I've been bitten by this with squid after having to kill the squid processes as a result of the upgrade process borking on 10.04 (LTS). I was upgrading to this: https://launchpad.net/ubuntu/+source/squid/2.7.STABLE7-1ubuntu12.2 replacing squid 2.7.STABLE7-1ubuntu12. I assume I'm missing something, cos it looks a lot like I'm fucked and I need to reboot to get squid to start from init again. Surely not... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
When will be that rewrite complete? Or anyone has workaround, how to kill start/killed or stop/killed job? It could be only one-time job / script. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/406397 Title: init: job stuck with expect fork/daemon when parent reaps child -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
This and bug #530779 are fundamental due to Upstart's use of ptrace() for fork following - a rewrite of Upstart is in progress which uses other newer kernel mechanisms to follow forks and would not be vulnerable to this kind of issue. However there's no quick fix to it, and no way to backport that code. -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Also affects: pld-linux Importance: Undecided Status: New -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I had the same problem with Upstart 0.6.5. Job locked at the 'killed' state when the process Upstart waited for didn't even exist. This is quite a serious problem as: 1. Can happen when the job 'expect fork|daemon' stanza does not match what the process really does. And when it happens fixing the job description won't help, as a job with same name cannot be started any more. 2. Even worse: the system won't even shut down properly – it will stay waiting for the 'killed' job to finish which will never happen. Not good, when the shutdown is reboot during remote trouble-shooting. The solution seem 'obvious' to me: don't wait for a process that doesn't even exist (even in a 'zombie' state). Or do I miss something? -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Changed in: upstart Importance: Low = Medium -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Oh, sorry, I completely misunderstood your message. -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
For sanity's sake, I'm closing the Ubuntu tasks for upstream Upstart bugs. I've experimented with having both, but it is just making bugs hard to find now. Will use the policy whereby bugs on the Ubuntu package exist in the Ubuntu packaging or patches only, any bugs in the Upstart code are Upstream bugs. ** Changed in: upstart (Ubuntu) Status: Triaged = Invalid -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
AW: [Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Has anybody forwarded this problem to upstream? -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: AW: [Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
On Wed, 2010-04-07 at 18:47 +, Lars Düsing wrote: Has anybody forwarded this problem to upstream? Ubuntu are upstream for Upstart (I wrote it!) Scott -- Scott James Remnant sc...@ubuntu.com -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Hi... I got bitten by this bug earlier today. I was attempting to set 'autossh' to be respawned, via a new autossh.conf file. I copied the cron.conf file, and changed the exec line to the appropriate autossh command line, and left the rest the same. The mistake was that autossh doesn't fork into the background, but 'expect fork' was set. The outcome was that 'initctl stop autossh' and 'initctl start autossh' both hang, and I had to copy autossh.conf to autossh2.conf and delete the 'expect fork' line before I could get autossh to run. I can't get rid of the old autossh entry in 'initctl list', except possibly by rebooting. Since I'm remotely logged in, I don't want to do that unless I'm confident my connection is going to work... yay, catch-22. exec /usr/bin/autossh -M 81 -N -R 29:127.0.0.1:22 servername -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I would vote for this to be higher priority. For anybody who doesn't know 'old' init, it's frustrating to have to learn all the old syntax just to get common stuff like Apache running properly. In my case, I need a custom Xvfb service and there's nothing out there right now. Apache already has maintained service scripts, but other programs don't. If not increasing the priority of the ticket, can the Ubuntu docs be updated to reflect that Upstart is not ready for mainline users to start moving init scripts to the format? -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
On Sat, 2009-12-12 at 09:55 +, Lars Düsing wrote: I'm wondering why this bug has a importance of low, as it renders using upstart for many daemons (including apache, postfix and others) as impossible. Because conversion of those daemons over to Upstart is not a priority; just carry on using the existing init script. Scott -- Have you ever, ever felt like this? Had strange things happen? Are you going round the twist? -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
I'm wondering why this bug has a importance of low, as it renders using upstart for many daemons (including apache, postfix and others) as impossible. ** Changed in: aiccu (Ubuntu) Status: New = In Progress ** Changed in: aiccu (Ubuntu) Status: In Progress = New -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
Back to the bug itself again: A very evil solution would be checking the lowest pid of the daemon (ok, you have to look out when pids are starting again from zero again...) -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
After looking into aiccu deeper, I see you have a real problem. You keep the first pid you get from the first fork/clone. At least aiccu uses multiple threads on initialization: l...@artus:~$ sudo strace -o aiccu.log aiccu start l...@artus:~$ grep clone aiccu.log clone(child_stack=0, flags=CLONE_PARENT_SETTID|SIGCHLD, parent_tidptr=0xbfe8ca94) = 2992 clone(child_stack=0, flags=CLONE_PARENT_SETTID|SIGCHLD, parent_tidptr=0xbfe8ca94) = 2994 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb773e938) = 2996 l...@artus:~$ ps aux|grep aiccu root 2996 0.0 0.0 19732 832 ?Ssl 10:39 0:00 aiccu start l...@artus:~$ service aiccu status aiccu start/running, process 2992 l...@artus:~$ ps aux|grep 2992 lars 3049 0.0 0.0 3040 792 pts/0R+ 10:41 0:00 grep 2992 That means: you track pid 2992, which is only used during initialization. Real pid is 2996. On service aiccu stop you try to kill pid 2992 - which is not there, and you keep stuck in a inifinite loop. -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
** Also affects: aiccu (Ubuntu) Importance: Undecided Status: New -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
It would be a good workaround in this case though.. I'm not saying that pidfile should get used by default, but it's a nice option to have in case the program's pidfile behavior is sane. -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
A good workaround for this might be pidfile handling, where upstart would use a given pidfile for monitoring the job. -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
On Sat, 2009-10-03 at 15:10 +, Daniel Hahler wrote: A good workaround for this might be pidfile handling, where upstart would use a given pidfile for monitoring the job. Ugh, god no. Do you know how many bugs there are with a system of requiring applications to write the correct pid to a file? Do you know how many major problems you introduce if they get it wrong? The solution is to use something like cgroups or the proc_connector to track multiple processes. Scott -- Have you ever, ever felt like this? Had strange things happen? Are you going round the twist? -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 406397] Re: init: job stuck with expect fork/daemon when parent reaps child
This also happens when you use expect fork or expect daemon combined with script, Upstart ends up following the first spawned child whose exit status is reaped by the shell. For example: script ARGS=$(cat /etc/default/myservice) exec /sbin/myservice $ARGS end script Upstart ends up with the pid of cat, and never receives SIGCHLD for it. So stays in running indefinitely, and when you try and stop it, hangs in stop/killed ** Summary changed: - init: job stuck with expect fork/daemon when parent reaps child (avahi-daemon) + init: job stuck with expect fork/daemon when parent reaps child ** Also affects: upstart (Ubuntu) Importance: Undecided Status: New ** Changed in: upstart (Ubuntu) Status: New = Triaged ** Changed in: upstart (Ubuntu) Importance: Undecided = Low -- init: job stuck with expect fork/daemon when parent reaps child https://bugs.launchpad.net/bugs/406397 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
