EJB通过ANT卸载发布项目时BUILDFAILED

05_通过ANT 虽然可以提高EJB应用的开发效率，

但有时卸载发布的项目时，有时会出现如下错误：

Buildfile: F:\workspace\eclipse\thirdspace\HelloWorld\build.xml
undeploy:
   [delete] Deleting: F:\soft\install\jboss-4.2.3.GA\server\default\deploy\HelloWord.jar

BUILD FAILED
F:\workspace\eclipse\thirdspace\HelloWorld\build.xml:41: Unable to delete file F:\soft\install\jboss-4.2.3.GA\server\default\deploy\HelloWord.jar

Total time: 188 milliseconds

这时，关闭JBOSS服务器，再重新卸载项目即可，

Buildfile: F:\workspace\eclipse\thirdspace\HelloWorld\build.xml
undeploy:
   [delete] Deleting: F:\soft\install\jboss-4.2.3.GA\server\default\deploy\HelloWord.jar
BUILD SUCCESSFUL
Total time: 167 milliseconds

另外，出现这个成功提示，有时并不一定就真正的卸载了，这里要检查JBOSS的输出控制台或项目发布目录：

21:07:23,669 INFO  [EJBContainer] STOPPED EJB: cn.wch.ejb3.impl.HelloWorldBean ejbName: HelloWorldBean
21:07:23,673 WARN  [JmxKernelAbstraction] jboss.j2ee:jar=HelloWord.jar,name=HelloWorldBean,service=EJB3 is not registered

控制台出现这个，则说明卸载成功。