Hi with jboss 4.2 I have problems connecting with mysql when deploying my application (it worked well on another server, but I cant find the difference). mysql -u bbcJbossUser -p -h localhost bbcJboss my mysql-ds.xml <?xml version="1.0" encoding="UTF-8"?> | <datasources> | <local-tx-datasource> | <jndi-name>MySqlDS</jndi-name> | <connection-url>jdbc:mysql://localhost:3306/bbcJboss</connection-url> | <driver-class>com.mysql.jdbc.Driver</driver-class> | <user-name>bbcJbossUser</user-name> | <password>GEHEIM</password> | <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> | <metadata> | <type-mapping>mySQL</type-mapping> | </metadata> | </local-tx-datasource> | </datasources> I get the following output on the console: | ... | 10:53:37,435 INFO [EntityBinder] Bind entity com.babuco.session.Session on table Session | 10:53:37,524 INFO [ConnectionProviderFactory] Initializing connection provider: org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider | 10:53:37,528 INFO [InjectedDataSourceConnectionProvider] Using provided datasource | 10:53:37,531 WARN [JBossManagedConnectionPool] Throwable while attempting to get a new connection: null | org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: | | ** BEGIN NESTED EXCEPTION ** | | java.net.ConnectException | MESSAGE: Connection refused | | STACKTRACE: | | java.net.ConnectException: Connection refused | at java.net.PlainSocketImpl.socketConnect(Native Method) | at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) | at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) | at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) | at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) | at java.net.Socket.connect(Socket.java:519) | at java.net.Socket.connect(Socket.java:469) | at java.net.Socket.<init>(Socket.java:366) | at java.net.Socket.<init>(Socket.java:208) | ... | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048668#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...