that sounds very odd. so if I understand correctly. this happens when you hit the login page. I assume this don't happen with a static html page? by any chance are you using jsp tags or some web framework?
peter On 4/20/05, LeeAnn Pultz <[EMAIL PROTECTED]> wrote: > This is not a memory leak in the application - we have hooked up a profiler > to the application and watched the actual memory usage when causing this > issue to happen. We have lots of memory available, are nowhere near the > Xmx limit, and the machine has lots of memory available over and above the > Xmx limit. > > In fact, I can cause the error to happen every single time, simply by > hitting the first web page (login page) of the application - I don't have > to log in, or do any "work". All I have to do to get the error to happen > is hit 18-19 different instances of the web application, watch the Active > thread count go up to 100 and tip over the tomcat. > > We've gone through all of the suggested infomation out on the web - we've > tweaked the Xms, Xmx and Xss parameters - none of these changes made any > difference, since we're not actually running out of memory. I've > reproduced this on 3 different machines, all running Red Hat Linux ES 3.0 - > both with LD_ASSUME_KERNEL 2.4.19 and without, so the Linux threading model > doesn't seem to affect the problem. > > > At 04:16 AM 4/20/2005, you wrote: > >I'm able to go up to 647 threads and 500 concurrent connections with > >5.5.4 without any problems. chances are, it's a memory leak in the > >webapp. only way to know for sure is to profile the application. > > > >peter lin > > > > > >On 4/20/05, Tim Funk <[EMAIL PROTECTED]> wrote: > > > There are no limits in tomcat. > > > http://jakarta.apache.org/tomcat/faq/memory.html > > > > > > -Tim > > > > > > LeeAnn Pultz wrote: > > > > > > > I have a tomcat server with multiple copies of our web application > > > > running. We are running into what seems to be a hard-coded limit on the > > > > number of threads available to the Tomcat application. > > > > > > > > I have added code to our servlet class which prints out the number of > > > > active threads whenever I initialize the servlet. On Red Hat Linux > > > > boxes, whenever we start up enough copies of the servlet to hit 100 > > > > active threads, we reach an OutOfMemoryError - regardless of the Xms/Xmx > > > > settings (memory profiling shows that we have plenty of memory > > > > available). On Windows XP, 50 seems to be the magic number. > > > > > > > > I have tried tweaking Xss parameters, my ulimit command in Linux shows > > > > "unlimited" - and I have reached the same results with Tomcat 3.3.1, > > > > 4.0.28 and 5.0.28 using Java 1.4.1 and 1.4.2. When I use WebLogic 8.1 > > > > on the same Linux box, I reach 241 active threads with no problems > > > > whatsoever (stopped my testing at that number) so it does not seem to be > > > > an o/s limitation, or a java limitation - which leads me to believe > > > > there is something in Tomcat? > > > > > > > > Is the number of threads available to tomcat hard coded somewhere? Is > > > > there a parameter or configuration setting that I can change to increase > > > > this? > > > > > > > > If this question is better off posted to the developers list, please > > > > someone, let me know :) > > > > > > > > > > --------------------------------------------------------------------- > > > 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] > > LeeAnn Pultz > ExtraView Corporation > [EMAIL PROTECTED] > 831-461-7100 x115 > > > --------------------------------------------------------------------- > 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]
