"groovie" wrote : I think, this is the issue of the ConnectionPool-Manager, | who will disables or remove the connection from the pool | and try to establish a new one (using my ManagedConnection) | Yes Jboss JCA code will call the ManagedConnection's createManagedConnection(..) and matchManagedConnection() while creating the new connection from the pool and retreiving the existing connection from the Pool. You should refer to the code implementation of the jdbc ra here https://anonsvn.jboss.org/repos/jbossas/branches/Branch_4_2/connector/src... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4265045#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...