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Re: 2 copies started at once

From: Nick Upson
Subject: Re: 2 copies started at once
Date: Fri, 27 Jul 2007 13:22:16 +0100

I use

set daemon 120

I wondered if it was related to using restart into the script, which,
standard behaviour, attempts to stop the pid and removes the pid file
anyway. I need this in case the process crashed as a simple "start"
stops if the pid file exists.
does monit distinguish between start and restart if the command?

On 27/07/07, Jan-Henrik Haukeland <address@hidden> wrote:
> Monit simply does an exec of the script to create one process and
> there is nothing I can think of in monit's code that should be able
> to create this problem. The only thing I can think of is if, monit
> has a very short poll cycle (e.g. 1-5 sec) and the script does not
> write a pid file before monit polls again. So unless you use a very
> short poll cycle[1] I think you need to investigate and debug the
> start script to find the cause of the problem.
> [1] If you do use a short poll cycle, try "set daemon 60" instead.
> On 26. jul. 2007, at 16.16, Nick Upson wrote:
> > here is the config file entry
> >
> >    check process bs1 with pidfile "/var/run/"
> >    start program = "/opt/unb/bin/ 1 restart"
> >    stop program = "/opt/unb/bin/ 1 stop"
> >
> > (I use restart in case it crashed, leaving the old pid file)
> >
> > I can see how restart could cause a problem if I called it twice in
> > very quick sucession but I didn't.
> >
> > On 26/07/07, Nick Upson <address@hidden> wrote:
> >> This may be related to the issue I asked about yesterday (turns
> >> out to
> >> be a bug in monit) or may not.
> >>
> >> Sometimes, even rarely, I do "monit start bs1" where bs1 is one of my
> >> processes and 2 are started at once (same start time shown from ps
> >> command, pid very close even).
> >>
> >> How can I avoid this?
> >>
> >> The config file entry is a normal one, nothing unusual. The script
> >> executed to start/stop was originally in /etc/init.d and worked fine
> --
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