High CPU Usage by Tomcat
Posted on 2014-04-11
Our developer team had just updated a link within our webpage that gives our clients a new look and feel to our webpage. As a sysadmin, I helped with the deploying the jsp.war file (build) to the server. Now, the CPU usage for tomcat has maxed out to 99-100%. Of course restarting the service will bring it down, but eventually it will max out again. The development team has looked at the logs, and cannot pin point what the issue is. I don't know java, or tomcat at all, but my colleague does, and have add more memory to the permgen, java and we've even added more physical memory and CPU, but to no avail. The developers looked at the codes and find nothing wrong. What is odd is that this high CPU spike has something to do with the change from the developers because it happened right after the update. However, we do not want to point fingers, nor do they. I looked at anything possible from a Windows server standpoint. Again, I am not a java expert or a developer, but can someone here who is provide some sort of theory as to what it can possibly be or provide some advice so i can pass that info to our developers? We use VisualVM to looked for any issues, and already had our DBA look at it from a DB perspective, but still to no avail. The application we use is inhouse (proprietary).