Article Original Creation Date: 2012-01-12

Overview

The Tomcat service stopped processing Inform requests and started using 100% of the CPU load. Restarting Tomcat solved the issue.

Environment

• Solaris 10
• Apache-Tomcat 5.5.25

Root Cause

Java Heap memory usage was reaching a maximum within six days. The current setting of JAVA_OPTS in the catalina.sh did not solve the issue with garbage collection.

Resolution

To resolve the issue mentioned previously, implement the steps listed below:

1. Update JAVA_OPTS in /bin/catalina.sh as mentioned below:

   -Xms128m 
   -Xmx256m 
   -Xss128k 
   -XX:PermSize=64m 
   -XX:MaxPermSize=256m 
   -verbose:gc 
   -Xloggc:acs1gc.log 
   -XX:+PrintHeapAtGC 
   -XX:+PrintGCDetails 
   -XX:+PrintGCTimeStamps 
   -XX:+PrintTenuringDistribution 
   -Dsun.rmi.dgc.client.gcInterval=1800000 
   -Dsun.rmi.dgc.server.gcInterval=1800000 
   -Duser.language=en 
   -Duser.country=US 
   -Dorg.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER=true

2. Change the session-timeout setting in /conf/web.xml from 30 to 1.
3. Restart Tomcat.

Confirmation

After implementing the steps mentioned previously, the Java Heap memory usage will not reach a maximum and Tomcat will process the Inform requests, without the need of a restart.