Hi, Nagios is also an excellent tool along these lines. You didn't mention you tomcat version, but recent ones have a switch in $CATALINA_HOME/bin/catalina.sh which writes the PID out to a file of your choice. This will be the actual PID and you don't have to write the script yourself.
Yoav Shapira Millennium Research Informatics >-----Original Message----- >From: QM [mailto:[EMAIL PROTECTED] >Sent: Tuesday, July 27, 2004 8:55 PM >To: Tomcat Users List >Subject: Re: tomcat PID creation and monitoring > >On Tue, Jul 27, 2004 at 02:14:13PM -0700, Caleb Walker wrote: >: PID=$! >: echo $PID > $pid_file >: Doing this makes tomcat create a pid file that I can then monitor with >: our monitoring server. What it does is look at the PID file and >: compares that with the running processes. >: What is happening is our monitoring system will display the service as >: down and I go into the server and the service is not down but the >: running processes do not match the PID file like the tomcat processes >: restart without using my PID file creation script. > >1/ IIRC, the script that fires off Tomcat calls commons-daemon (jsvc >is the native Linux portion) so $! won't give you a reliable PID. > >2/ Write (or find) an application-level watchdog that will occasionally >access the service itself and fire an action on failure. (A homegrown >tool could start with "lynx -dump" or something of that nature.) > >For example, BigIP performs an app-level ping by hitting a specified URL >and testing the response content. > >-QM > >-- > >software -- http://www.brandxdev.net >tech news -- http://www.RoarNetworX.com > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
