I'm still stuck on this problem. I can't even reproduce the problem in QA, which is a mirror from production. I've been monitoring JVM, JBOSS, memory, heap memory, threads, network, etc, ...in production and I could not find anything so far. I notice the following log message when I'm shooting the JBOSS down every night: "[org.apache.catalina.core.StandardWrapper] Waiting for 854 instance(s) to be deallocated" Could this message be related to this symptoms? Please any comments/help are welcome!!! Thanks.... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4219531#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...