500 Internal Server Error
java.lang.NullPointerException
at oracle.sysman.emo.adm.LoginBean.
at oracle.sysman.db.adm.LoginController.getLoginBean(LoginController.java:219)
at oracle.sysman.db.adm.LoginController.getLoginBean(LoginController.java:203)
at oracle.sysman.db.adm.LoginController.onEvent(LoginController.java:1186)
at oracle.sysman.db.adm.DBController.handleEvent(DBController.java:3064)
at oracle.sysman.emSDK.svlt.PageHandler.handleRequest(PageHandler.java:376)
at oracle.sysman.db.adm.RootController.handleRequest(RootController.java:169)
at oracle.sysman.db.adm.DBControllerResolver.handleRequest(DBControllerResolver.java:114)
at oracle.sysman.emSDK.svlt.EMServlet.myDoGet(EMServlet.java:688)
at oracle.sysman.emSDK.svlt.EMServlet.doGet(EMServlet.java:291)
at oracle.sysman.eml.app.Console.doGet(Console.java:285)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
at oracle.sysman.emSDK.svlt.EMRedirectFilter.doFilter(EMRedirectFilter.java:101)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
at oracle.sysman.db.adm.inst.HandleRepDownFilter.doFilter(HandleRepDownFilter.java:138)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:20)
at oracle.sysman.eml.app.ContextInitFilter.doFilter(ContextInitFilter.java:269)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:600)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:317)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:793)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:270)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)
at com.evermind[Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
at java.lang.Thread.run(Thread.java:534)
以前好用，我装了个jdk 就这样，高手解决一下
可能是你装的JDK版本较低造成的，装个高版本的JDK，比洞明逗如1.5的，然后修改PATH中纳卖的JDK路径为新安装的路径，再启动即可槐衡。
查看环境变量PATH
将oracle的相关路径，统一都剪切到这个变量历慎值和型的最前肢棚敬面，记住每个路径之间用分号隔开。
然后确定。当然再重启一下，更保险。
。。。和oracle没关系。报出野答的错误时空指针异常，是java的错误颂巧慧。你安装jdk的配置oracle的时候宽答错了。