Hi, We have a web application (XCP) which internally uses our java library implementaiton-dfc.jar (the dfc.jar contains API's to access our Documentum functionality). This java library internally uses timer threads which performs the activities need to be executed periodically and demon threads for clean-up activities.
We noticed the tomcat runs into OOM:PermGen issue when we use our web application which uses the java library (dfc.jar API's) in the below use case: Use Case: 1. Access a Documentum repository object (size will be in KB's) using the Documentum web application-XCP. 2. Undeploy the web application and redeploy it. 3. Repeat step-1 and 2 couple of times, OOM:PermGen issue can be noticed. Trouble Shooting & Analysis Done: 1. I have tried to comment out all the Timer and Demon threads in our java library (i.e. inside dfc.jar) and tried to perform the use case mentioned above and still noticed the issue with Tomcat App server. 2. Attached the memory profiler to Tomcat and tried to find the shortest GC path, the profiler shows the shortest GC to Tomcat threads. 3. Tried to reproduce the issue using other app servers like WAAS and was not able to find any issues. It appears to me that this is an issue specific to Tomcat app server, can you please let me know whether you have noticed the similar issues in the past and if yes, please specify any workaround/fix available for the same? Thanks, Nagaraja
