Hi, Using a test program i am posting emails via JMS. A Single MDB will upload an attachment to ftp server and will send the email. the test program will post messeages , creating a single thread. I discoverd that the JMS gets disconnected from the provider. Following is the error i am seeing. Caused by: org.jboss.util.NestedSQLException: No ManagedConnections available within configured blocking timeout ( 30000 [ms] ); - nested throwable: (javax.resource.ResourceException: No ManagedConnections available within configured blocki Any ideas please????? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3989935#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...