On Mon, Oct 22, 2012 at 04:23:38PM +0200, Hilton Gibson wrote: > Just a note. > > When Tomcat crashes, is the pid still there? > Would it not be better to monitor the port?
Good point. I already had Nagios watching ports from afar, so I've been concentrating on the simple case where the process actually disappears. We've been having crashes (process dies) lately but no hangs (process remains but is unresponsive) or runaways (process consumes much CPU but does little apparent work). Monit is right there on the same host and can do something about a crashed or hung service, so I'll be adding conditions and responses as I get a feel for the tool. I'm intrigued by the possibility of using the JMX plugin to recognize imminent PermGen exhaustion, take a thread dump and preemptively restart. -- Mark H. Wood, Lead System Programmer [email protected] Asking whether markets are efficient is like asking whether people are smart.
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