type Exception report
message
description The server encountered an internal error that prevented it from fulfilling this request.
exception
java.lang.NullPointerException frasca.gclu.sql.CorsoDb.select(CorsoDb.java:91) frasca.gclu.dati.Corso.get(Corso.java:153) frasca.gclu.dati.Corso.<init>(Corso.java:47) frasca.gclu.http.CorsoHttp.get(CorsoHttp.java:283) frasca.gclu.http.CorsoHttp.<init>(CorsoHttp.java:51) frasca.gclu.servlet.f0.doGet(f0.java:33) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.47 logs.