two apps end up with same pid

[Christopher Johnston]

Running into a weird problem on a number of my production systems, we end up having two different applications started up and monit records them as having the same PID so in turn its reporting that both apps are up.  Obviously only one app can have that PID but the problem is monit is reporting that the application is actually up when it is not.  The only way I have been able to resolve it is to echo some junk chars into the pid file so the app starts or stop/start the app.  Is this a known bug?  I am running 5.2.5 at the moment and tempted to upgrade.

The way I right out my pidfile is pretty straightforward and this happens directly in the run script.

    # drop pid into pidfile

    echo $$ > ${PIDFILE}

Process 'F17'

status running

monitoring status monitored

pid 32317

parent pid 32315

uptime 15h 35m 

children 0

memory kilobytes 871828

memory kilobytes total 871828

memory percent 3.5%

memory percent total 3.5%

cpu percent 0.0%

cpu percent total 0.0%

data collected Fri Oct 21 09:11:36 2011

Process 'F15' status running monitoring status monitored pid 32317 parent pid 32315 uptime 15h 35m  children 0 memory kilobytes 871828 memory kilobytes total 871828 memory percent 3.5% memory percent total 3.5% cpu percent 0.0% cpu percent total 0.0% data collected Fri Oct 21 09:11:36 2011