Your first post did not contain enough details about the issue, so probably got ignored :) Please post the entire exception stacktraces and also the relevant piece of code. Also more details on what this means: anonymous wrote : 1. All jars in Meta.inf is loaded every time from server, no local cache anonymous wrote : the Jar loaders report OutOfMemory Excpetion for big JARS Where? On server or on client? And entire exception stacktrace please. Also which exact version of JBossAS and which vendor and version of JDK? While posting logs or xml content or code, please remember to wrap it in a code block by using the Code button in the message editor window. Please use the Preview button to ensure that your post is correctly formatted. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4256531#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...