It looks more like an infinite loop. There are issues with tomcat, which causes infinite loops (see http://issues.apache.org/bugzilla/show_bug.cgi?id=36541) , but there are also chances that you simply programmed one yourself in your code. To check this, next time you tomcat has 99% cpu time, don't shut it down but kill -quit <tomcats_pid>. It will then print a complete stack-trace in the catalina.out (this isn't tomcat's feature, but jvm's). Use the stacktrace to detect infinite loops.
regards Leon On 9/23/05, Azariah Jeyakumar <[EMAIL PROTECTED]> wrote: > Hi, > > Has anyone seen Tomcat JVM using 99.9% cpu when there is no HTTP load at all? > The JSP pages are accessible fine without any loss in functionality, but the > machine is sluggish (expectedly, as the JVM is using all the CPU). If tomcat > is restarted, the problem goes away and the CPU usage returns to normal. > > I have not been able to reproduce the problem at will. It has been noticed > only twice or so in the past week, out of hundreds of attempts. > > I have seen other posts asking to tweak the settings like socket_* in > workers.properties files. But since I have not been able to reproduce the > problem at will, I am hesitant to change the parameters, not knowing which > change will fix the problem. > > Thanks for any input or pointers on: > - the nature of the problem that causes this 99.9% CPU usage > - how to reproduce the problem > - what parameters should be set in workers.properties file or elsewhere to > avoid this problem in the future. > > I am using Tomcat 5.0.28, Apache 2.x, jk2, Sun JRE 1.4.2_08 on Suse Linux > Enterprise Server (SLES 9 SP2). > > Thanks > Azariah > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
