OC4J配置的数据源,如果被OC4J自己内部运行的程序调用没有问题 如:oc4j903\j2ee\home\config\data-sources.xml中 在</data-sources>到</data-sources>之间添加 <data-source class="com.evermind.sql.ConnectionDataSource" location="jdbc/PortalDB" password="assgis" username="portal" url="jdbc:oracle:thin:@172.18.2.6:1521:apps" inactivity-timeout="30" max-connections="50" max-connect-attempts="2" min-connections="4" connection-driver="oracle.jdbc.driver.OracleDriver" schema="PortalDB" name="PortalDB"/> 则在程序中调用: DataSource dataSource = (DataSource) context.lookup("jdbc/PortalDB"); 没有问题; 如果是RMI远程调用,会出现如下错误: 'javax.naming.NamingException: Not in an application scope - start Orion with the -userThreads switch if using user-created threads' 
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