Hi,
Make sure you only have one version of the servlet API jar in your
classpath.  It should be in $CATALINA_HOME/common/lib -- make sure
there's only one there.  Further, make sure you don't have any servlet
JARs in your WEB-INF/lib directory.

Yoav Shapira http://www.yoavshapira.com


>-----Original Message-----
>From: Rob Tanner [mailto:[EMAIL PROTECTED]
>Sent: Monday, November 08, 2004 2:36 PM
>To: 'Tomcat Users List'
>Subject: What worke on 4.1.27 fails of 4.1.31
>
>I upgraded my development station to tomcat 4.1.31 from 4.1.27 and from
>j2sdk1.4.2_02 to j2sdk1.4.2_06.  The following unchanged snippet now
throws
>a
>NoSuchMethodError exception:
>
>   env.put(Context.SECURITY_PRINCIPAL, BIND_DN);
>   env.put(Context.SECURITY_CREDENTIALS, password);
>   env.put(Context.SECURITY_AUTHENTICATION, "simple");
>
>   ctx = new InitialDirContext(env);
>
>   session = request.getSession();
>
>   session.setAttribute("sess.context", ctx);
>   session.setAttribute("sess.env", env);
>   session.setAttribute("sess.uid", uid);
>   session.setAttribute("sess.dn", BIND_DN);
>   session.setAttribute("sess.valid", "true");
>
>
>The exception is thrown on the first session.setAttribute() statement
(line
>110 in the java source).  I have included the top of the stack trace
below
>(lines wrapped for readability):
>
>java.lang.NoSuchMethodError:\
>   javax.servlet.http.HttpSessionBindingEvent.<init>\
>
(Ljavax/servlet/http/HttpSession;Ljava/lang/String;Ljava/lang/Object;)V
>at org.apache.catalina.session.\
>   StandardSession.setAttribute(StandardSession.java:1231)
>at org.apache.catalina.session.\
>   StandardSessionFacade.setAttribute(StandardSessionFacade.java:144)
>at ClassListAdministrator.doGet(ClassListAdministrator.java:110)
>
>Another much more complex servlet that I moved over but that does not
>require
>the use of sessions works fine, so I think the basic installation is
okay.
>Any idea why that error's coming up on sessions?
>
>Thanks,
>Rob
>
>
>--
>Rob Tanner
>UNIX Services Manager
>Linfield College, McMinnville OR
>
>
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