Have a look to https://community.jboss.org/wiki/configdatasources
How your connection are failing? Are all connections are invalid, fast-fail might help? You might use the JMX console (see Datasource pools) and invoke flush, in this case the connections are closed and the pool is new created.
Thanks for your reply,
Actually, When I got this exception I have a non-working connection object i.e. I got connection successfully but when I try to use it, throws above exception.
In this case, I need to restart JBoss...
I don't know how to avoid JBoss Restart after I got this exception and got and working connection again..