WAS部署应用的问题请教？

操作系统suse 11 sp3
中间件：was6.1
数据库：db2

问题：
在发布一个ear包后， 打卡浏览器输入地址：提示Error 500: org/eclipse/jdt/internal/compiler/env/INameEnvironment

后台查看SystemOut.log

00000023 WebApp E Servlet Error-[org/eclipse/jdt/internal/compiler/env/INameEnvir
onment]: java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/compiler/env/INameEnvironment
at com.ibm.ws.jsp.translator.compiler.JDTCompilerFactory.createJspCompiler(JDTCompilerFactory.java:17)
at com.ibm.ws.jsp.translator.utils.JspTranslatorUtil.translateJspAndCompile(JspTranslatorUtil.java:117)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.translateJsp(AbstractJSPExtensionServletWra
pper.java:349)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper._checkForTranslation(AbstractJSPExtensionSe
rvletWrapper.java:317)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.checkForTranslation(AbstractJSPExtensionSer
vletWrapper.java:226)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWr
apper.java:131)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionProcessor.handleRequest(AbstractJSPExtensionProcessor.java
:270)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:308)
at com.ibm.ws.webcontainer.extension.DefaultExtensionProcessor.handleRequest(DefaultExtensionProcessor.java:465)

部署一个简单的hello world 的ear包也是同样的报错。  百度没找到什么答案。求大师解答。