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
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