Date: Sat, 20 Sep 2008 15:54:51 +0200 From: Mel <fbsd.questions@rachie.is-a-geek.net> To: freebsd-questions@freebsd.org Cc: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>, stevefranks@ieee.org Subject: Re: kill -KILL fails to kill process Message-ID: <200809201554.51657.fbsd.questions@rachie.is-a-geek.net> In-Reply-To: <20080920083439.B8658@wojtek.tensor.gdynia.pl> References: <200809191812.m8JICBhB011472@lurza.secnetix.de> <20080920083439.B8658@wojtek.tensor.gdynia.pl>
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On Saturday 20 September 2008 08:35:53 Wojciech Puchar wrote:
> > 1. The process hangs in "disk wait" (flag "D" in ps' STAT
> > column). This often means there's a hardware problem
> > with your disk or controller (or a driver bug), or a
> > network problem if you use NFS.
>
> not this for sure. no NFS, no filesystem is blocked.
>
> > 2. The process was suspended (SIGSTOP). In this case
> > there is the flag "T" in ps' STAT column. Try sending
> > a SIGCONT to the process.
>
> tried (kill -19) then kill -9, doesn't help.
>
> > Such a "dead" entry in the process table is called a
> > zombie process. In ps' STAT column there is the "Z"
> > flag.
>
> no Z flag.
>
> 887 ?? Ts 0:02,20 asterisk -C /centrala/etc/asterisk.conf
Some processes suspend themselves directly on a certain condition, or because
they try to read from a terminal. Example:
# cat -n test.sh
1 #!/bin/sh
2
3 read LINE;
4 echo $LINE;
# sh test.sh </dev/tty &
[1] 103
# ps -axo pid,command,stat 103
PID COMMAND STAT
103 sh test.sh TJ
# kill -CONT 103
[1]+ Stopped sh test.sh < /dev/tty
However, this one can be killed:
# kill -KILL 103
[1]+ Killed: 9 sh test.sh < /dev/tty
I'm not entirely sure why, but it could be cause the tty is valid. Anything in
asterisk that reads from a terminal (maybe a closed stdin?)
--
Mel
Problem with today's modular software: they start with the modules
and never get to the software part.
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