Yesd, I had, I changed to mod_jserv, I'm still waiting for the same answer as you do, for the high CPU request of mod_jk... Guido. ----- Original Message ----- From: "Timo Carl" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, May 23, 2001 10:37 AM Subject: lb-problem with mod_jk: high cpu load on apache when tomcat breaks down > Hello tomcat-users, > > We are having a problem with mod_jk and load balancing. > Does anyone else have had similar problems with that kind of > architecture setup? > > Our System: > =========== > Alteon switch (round robin) > | > | > three Apache 1.3.19 on three SPARC-Servers (called s1,s2,s3)(3 CPU, 3 > GB) > | > |each: > mod_jk with lb (in case of s1: 1*s1,0.001*s2,0.001*s3) > | > | > | > two tomcats-3.2.1 on each server (jdk1.2.2, native threads, -Xms50M > -Xoss4M -Xss4M -Xmx600M) > > We chose this architecture because the alteon is not able to perform > session tracking properly. > > The Problem: > ============ > On startup, the system works fine. Each java-Process has about 1-8% CPU > load. > After one day or so, one tomcat takes 40% CPU load or more. I think the > reason is inside our applications. But thats not the error I want to > post: > > After the error of a tomcat, the httpd-processes on EACH Server begin to > take a lot of CPU time (8-30% each). > In server-status I can see that the processes are waiting for a response > of that tomcat. > Of course I want to have a fault tolerance, but when I have a problem > with one server, the other servers go down too. > > > Did/Does anyone have the same problem and/or a similar system > architecture? > Maybe anyone solved that problem? > > Greetings and thanks in advance, > Timo Carl
