在我的web应用程序中,我有时会得到一个空指针异常,它运行在RAD 8.5和8.5中。An exception was thrown by one of the service methods of the servlet [Faces Servlet] in application [Gedit]. Exception created :at org.apache.myfaces.shared_impl.context.flash. FlashImpl.isKeepMessages(FlashImpl.java