weblogic8.1+eclipse无法debug启动

出现错误：
java.lang.NullPointerException
at oracle.eclipse.tools.weblogic.legacy.GenericWeblogicServerBehaviour.findWorkshopJspDebuggerLaunchConfigurationDelegate(GenericWeblogicServerBehaviour.java:477)
at oracle.eclipse.tools.weblogic.legacy.GenericWeblogicServerBehaviour.setupLaunch(GenericWeblogicServerBehaviour.java:226)
at org.eclipse.jst.server.generic.core.internal.ExternalLaunchConfigurationDelegate.launch(ExternalLaunchConfigurationDelegate.java:101)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:853)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:703)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:696)
at org.eclipse.wst.server.core.internal.Server.startImpl2(Server.java:3051)
at org.eclipse.wst.server.core.internal.Server.startImpl(Server.java:3001)
at org.eclipse.wst.server.core.internal.Server$StartJob.run(Server.java:300)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
   --------------------编程问答-------------------- 只是debug不可以启动吗？ --------------------编程问答-------------------- 是的，正常启动可以

补充：Java ,  Eclipse