Hi, I am using JBOSS Application server for my message migration. Even though, I have changed my heap size in the run.bat (increasing to 1024m) of JBoss bootstrap, I still get java.lang.OutOfMemoryError: Java heap space error when my message numbers exceed 30,000. The size of messages are very small, but it is not passing from that number. I test the same demand with JINI and JavaSpace, and it is working like a charm. 1) Do you guys know any other way that I should do to increase my heap size except Jboss run.bat? 2) Have you ever encountered such a problem even after increasing heap size? 3) Is there such a limitation in Jboss for its acceptable number of messages? Any kind of reply is highly appreciated. thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4107919#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...