Type Exception Report
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
java.lang.NullPointerException tw.edu.nccu.registration.servlet.RegistrationAction.doConferenceInfo(RegistrationAction.java:179) tw.edu.nccu.registration.servlet.RegistrationAction.perform(RegistrationAction.java:46) tw.edu.nccu.registration.servlet.Controller.doGet(Controller.java:66) javax.servlet.http.HttpServlet.service(HttpServlet.java:529) javax.servlet.http.HttpServlet.service(HttpServlet.java:623) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
Note The full stack trace of the root cause is available in the server logs.