I have a j2ee application that is packaged into a WAR file. It used to work very well in Linux with jboss 4.0.2. However, recently, for some unknown reason, when my web app. tries to connect to the database, I got the following exception [JBossManagedConnectionPool] Throwable while attempting to get a new connection: null org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Apparently wrong driver class specified for URL: class: oracle.jdbc.driver.OracleDriver, url: jdbc:oracle:thin:@xxxx:1521:xx) at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.c reateManagedConnection(LocalManagedConnectionFactory.java:179) at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.cr eateConnectionEventListener(InternalManagedConnectionPool.java:565) at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.ge tConnection(InternalManagedConnectionPool.java:250) at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BaseP ool.getConnection(JBossManagedConnectionPool.java:491) at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManage dConnection(BaseConnectionManager2.java:341) at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedCo nnection(TxConnectionManager.java:301) at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateC onnection(BaseConnectionManager2.java:396) at org.jboss.resource.connectionmanager.BaseConnectionManager2$Connectio nManagerProxy.allocateConnection(BaseConnectionManager2.java:842) at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(Wrapp erDataSource.java:88) at ....... .............................. I later found out the reason I got this exception is that I put ojdbc14.jar inside the dir $my_app_context/WEB-INF/lib, if I put it under $jboss_home/server/default/lib, I do not have this problem. But I tried on Windows, even if I put this jar file under $jboss_home/server/default/lib, I do not have this problem. Why I got this strange behavior? I do want to package this ojdbc14.jar into my WAR file, so that the user will not need to copy it explicitly to the $jboss_home/server/default/lib dir. I have another file called oracle-ds.xml which was put in $jboss_home/server/default/deploy to config oracle data source. Can anyone help me on my problem? Thanks, David View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4044781#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...