Erro Throwable while attempting to get a new connection

Pessoal,
Preciso resolver essa msg de erro. Alguém pode ajudar? estou usando o Jboss 4.0.3 com datasource
16:00:52,250 WARN  [JBossManagedConnectionPool] Throwable while attempting to get a new connection: null

org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: Exceção de E/S: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=153094144)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4)))))

at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:164)

at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:519)

at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:208)

at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:529)

at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:410)

at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:342)

at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:462)

at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:894)

at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:73)

at br.com.abril.classificados.carga.bd.GetConnectionTb54.getConnection(GetConnectionTb54.java:40)

at br.com.abril.classificados.carga.dao.SelectsDAO.(SelectsDAO.java:50)

at br.com.abril.classificados.carga.business.CarregandoAnuncios.upgrade(CarregandoAnuncios.java:43)

at br.com.abril.classificados.carga.service.PrCargaIncService.perform(PrCargaIncService.java:110)

at org.jboss.varia.scheduler.Scheduler$Listener.handleNotification(Scheduler.java:1221)

at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:585)

at org.jboss.mx.notification.NotificationListenerProxy.invoke(NotificationListenerProxy.java:138)

at $Proxy10.handleNotification(Unknown Source)

at javax.management.NotificationBroadcasterSupport.handleNotification(NotificationBroadcasterSupport.java:221)

at javax.management.NotificationBroadcasterSupport.sendNotification(NotificationBroadcasterSupport.java:184)

at javax.management.timer.Timer.sendNotification(Timer.java:1295)

at javax.management.timer.Timer.notifyAlarmClock(Timer.java:1264)

at javax.management.timer.TimerAlarmClock.run(Timer.java:1347)

at java.util.TimerThread.mainLoop(Timer.java:512)

at java.util.TimerThread.run(Timer.java:462)

Caused by: java.sql.SQLException: Exceção de E/S: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=153094144)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)

at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3678)

at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:352)

at oracle.jdbc.driver.OracleConnection.(OracleConnection.java:365)

at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:547)

at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:347)

at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:154)

… 25 more
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