Wow,thanks for your quick reply.I am using tomcat 6.0.29.After trying
your way,now I can successfully deploy ejb-sample to tomcat.But when
starting the the application.
An EJB exception will occur,have you ever met this,or is this an OPENEJB bug..
The OPENEJB is downloaded from the URL you provided
http://www.apache.org/dyn/closer.cgi/openejb/3.1.2/openejb.war.

2010-08-10 17:26:53,343 - ERROR - Unable to clear Sun JarFileFactory cache
java.lang.ClassCastException: java.lang.String cannot be cast to java.net.URL
        at 
org.apache.openejb.ClassLoaderUtil.clearSunJarFileFactoryCache(ClassLoaderUtil.java:173)
        at 
org.apache.openejb.ClassLoaderUtil.destroyClassLoader(ClassLoaderUtil.java:130)
        at 
org.apache.openejb.ClassLoaderUtil.destroyClassLoader(ClassLoaderUtil.java:97)
        at 
org.apache.openejb.config.DeploymentLoader.load(DeploymentLoader.java:185)
        at 
org.apache.openejb.config.ConfigurationFactory.configureApplication(ConfigurationFactory.java:509)
        at 
org.apache.openejb.config.ConfigurationFactory.getOpenEjbConfiguration(ConfigurationFactory.java:380)
        at 
org.apache.openejb.assembler.classic.Assembler.getOpenEjbConfiguration(Assembler.java:299)
        at 
org.apache.openejb.assembler.classic.Assembler.build(Assembler.java:278)
        at org.apache.openejb.OpenEJB$Instance.<init>(OpenEJB.java:137)
        at org.apache.openejb.OpenEJB.init(OpenEJB.java:286)
        at 
org.apache.openejb.tomcat.catalina.TomcatLoader.init(TomcatLoader.java:123)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.openejb.loader.Embedder.init(Embedder.java:75)
        at org.apache.openejb.tomcat.loader.TomcatHook.hook(TomcatHook.java:98)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at 
org.apache.openejb.tomcat.loader.TomcatEmbedder.embed(TomcatEmbedder.java:77)
        at 
org.apache.openejb.tomcat.loader.LoaderServlet.init(LoaderServlet.java:44)
        at 
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
        at 
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)
        at 
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4350)
        at 
org.apache.catalina.core.StandardContext.start(StandardContext.java:4659)
        at 
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at 
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:905)
        at 
org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:740)
        at 
org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:500)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
        at 
org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
        at 
org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at 
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
        at 
org.apache.catalina.core.StandardService.start(StandardService.java:519)
        at 
org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

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