User development, A new message was posted in the thread "Setting MDB Max Pool Size": http://community.jboss.org/message/523551#523551 Author : chinthaka udara Profile : http://community.jboss.org/people/chinthaka.udara@gmail.com Message: -------------------------------------------------------------- Thanks   now in jmx-console MaxPoolSize is show as 1. so that i can assure that only one MDB isntance is created here. which make it singleton   @Pool (value=PoolDefaults.POOL_IMPLEMENTATION_STRICTMAX,maxSize=1)   here you need to import   import org.jboss.ejb3.annotation.Pool; import org.jboss.ejb3.annotation.defaults.PoolDefaults;   from jar --> jboss-ejb3-ext-api.jar -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/523551#523551