JBoss maintains a pool of connections. When an application requests for a connection from the datasource, the server returns a connection from this pool. The application then has to call the close method on the connection so that the connection is returned back to the pool (where it continues to stay). Is your application calling the close method on the connection, once it is done with whatever processing it does? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4138233#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...