I understand. Yesterday I took some time to read about. Here they explained how to set a new value to this "maxInstances" attribute: http://mail-archives.apache.org/mod_mbox/tomcat-users/200803.mbox/%3CBLU1... Do you know if there is some monitor, tool, jboss web-console, etc... where I can check the real time "maxInstances" value?! Otherwise how can I know that I need to increase this "maxInstances" value? But as you correctly said..."how did it end up creating 854 instances"... I have no idea. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4220571#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...