there was only file mysql-ds.xml I have removed even that, now i am getting following error | 12:41:11,381 INFO [DatasourceConnectionProvider] Using datasource: java:JbpmDS | 12:41:11,381 WARN [JBossManagedConnectionPool] Throwable while attempting to get a new connection: null | org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.lang.NullPointerException) | at org.jboss.resource.adapter.jdbc.xa.XAManagedConnectionFactory.createManagedConnection(XAManagedConnectionFactory.java:144) | at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:577) | at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:262) | at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:500) | at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:341) | at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:315) | at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:396) | at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:842) | at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:88) | at org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:69) | at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:84) | | my jbpm-mysql-ds.xml contains <xa-datasource> | <jndi-name>JbpmDS</jndi-name> | | <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class> | <xa-datasource-property name="URL">${jdbc.mysql.url}</xa-datasource-property> | <user-name>${jdbc.mysql.username}</user-name> | <password>${jdbc.mysql.password}</password> | | <!-- reduce isolation from the default level (repeatable read) --> | <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation> | <!-- separate connections used with and without JTA transaction --> | <no-tx-separate-pools /> | <!-- disable transaction interleaving --> | <track-connection-by-tx /> | | ................................ | | My question is do i need to declare mysql-ds.xml in deploy folder with datasource called JbpmDS or I need to overwrite the url ,username and passsword of jbpm-mysql-ds.xml with my own values? I have tried to override the values of url etc if jbpm-mysql-ds.xml then there is no error but database tables are not generated automatically.. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211589#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...