You cannot ship servlet-api.jar as part of your war. If you do, you will have two different instances of the HttpSession.class object -- one loaded via Tomcat (from common/lib/servlet-api.jar) and the other loaded from the one in your .war.
So, put it on your compile-time classpath, but do not include it in your .war. Tim -----Original Message----- From: Artur Rataj [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 21, 2006 10:57 AM To: users@tomcat.apache.org Subject: Strange servlet exception Hello! I am developing a web app inside netbeans, and it worked until the following servlet exception began to appear: javax.servlet.ServletException: Servlet execution threw an exception root cause java.lang.NoClassDefFoundError: javax/servlet/http/HttpSession org.algstoch.httpuserlib.Password.removeUserId(Password.java:118) servlets.LoginScreenServlet.processRequest(LoginScreenServlet.java:31) servlets.LoginScreenServlet.doGet(LoginScreenServlet.java:108) javax.servlet.http.HttpServlet.service(HttpServlet.java:689) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) The platform is Java 1.6.0b2, tomcat 5.5.13. The methods pass HttpSession object until some method tries to call session.removeAttribute(), what throws the NoClassDefFoundException. The class is inside servlet-api.jar in tomcat, and inside the war because some library needs it to compile within netbeans, and netbeans propagates compile-time libraries to all categories. What can be the reason of it? Thanks, Artur --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
