关于网友提出的“页面打开要20秒”问题疑问，本网通过在网上对“页面打开要20秒”有关的相关答案进行了整理，供用户进行参考，详细问题解答如下：
问题：页面打开要20秒
描述:
java.lang.NullPointerException
at com.caucho.server.connection.AbstractHttpRequest.createSession(AbstractHttpRequest.java:1487)
at com.caucho.server.connection.AbstractHttpRequest.getSession(AbstractHttpRequest.java:1271)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:236)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:245)
at com.inxite.km.action.system.MenuAction.listSuperMenu(MenuAction.java:63)
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:585)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)
at com.inxite.km.action.interceptor.PermissionInterceptor.intercept(PermissionInterceptor.java:69)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
