探索－发现 使数位程序员郁闷一天的Bug 2与3的区别到底有多大？

下面是两个Hibernate 的 .hbm 文件的文件头

<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >

与

<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

一位数字的不同，引发了Weblogic 7001端口不能绑定而无法启动

***************************************************************************
The WebLogic Server did not start up properly.
Exception raised: 'weblogic.server.ServerLifecycleException: Server failed to bind to the requested port. See preceeding log message for details.'
Reason: Server failed to bind to the requested port. See preceeding log message for details.
***************************************************************************

开发环境 JDK1.4，Weblogic 8.1 SP6 Hibernate 3.0 Spring2.0

小弟刚出道，正在探索原因中，望有知情的前辈指点迷