On Wed, Jul 29, 2009 at 12:30 PM, <b.henr...@pepperone.be> wrote: > Thank you Leon, > > I will try kill -QUIT next time the problem will happen. > But the problem occurred with two applications with Tomcat 5.0.28 and > with Tomcat 5.5 .
Well, if its a but in your application or one of the libs in your applications, that are shared among multiple applications, you'll encounter it which each tomcat version. However tomcat 5.0.28 indeed had a bug: https://issues.apache.org/bugzilla/show_bug.cgi?id=36541 regards Leon > > Regards, > > Benjamin > > -----Original Message----- > From: Leon Rosenberg [mailto:rosenberg.l...@googlemail.com] > Sent: mercredi 29 juillet 2009 11:13 > To: Tomcat Users List > Subject: Re: Tomcat High CPU consommation > > Hello Benjamin, > > This sounds like an infinite loop - a bug in your application. This can > happen > if you don't use synchronization properly, for example write and read > to/from Hashmap without synchronization from 2 parallel threads. > When you detect this behaviour again, create a full thread dump by > sending QUIT signal to the process: > kill -QUIT pid > tomcat will print out the thread dump into catalina.out. Look for > suspicious threads or just send it to the list again. > > Btw, which tomcat version do you use exactly? > > regards > Leon > > On Wed, Jul 29, 2009 at 10:58 AM, <b.henr...@pepperone.be> wrote: >> Hello, >> >> >> >> We have sometimes Tomcat (5.x) who consume all the CPU (or 50 %) of > the >> CPU constantly in our productions servers (Linux or Windows). >> >> Our applications aren't doing anything and the only solution is to >> restart Tomcat. >> >> I don't know if the problem is related to Tomcat or to the JVM (Sun) > but >> I suspect that can occur when all the physical memory of the server is >> used. >> >> However, we set heap (between 1GO and 2GO) like this: Xmx = Xms < >> [physical memory available] when the server starts, so Tomcat > shouldn't >> have disk swapping problem. (Am I wrong?) But other services can eat > the >> memory and the server can begin to swap... >> >> Does anyone has had a problem like this? >> >> Thank you. >> >> >> >> Benjamin >> >> >> >> >> >> >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
