Error loading servlet because a ClassNotFoundError

Question

Hi,
I send a request to a servlet named "ControlAcceso".
The WebLogic server prints:
Error loading servlet: 'ControlAcceso'
java.lang.NoClassDefFoundError: gov/co/ssp/suin/ejb/ServiciosAutenticacionHome
at gov.co.ssp.suin.web.ControlAcceso.init(ControlAcceso.java:23)
I have an EJB that has a home interface named gov.co.ssp.suin.ejb.ServiciosAutenticacionHome;
the file ServiciosAutenticacionHome.class is located in a directory named /gov/co/ssp/suin/ejb
in a sui_ejb.jar file and in a sui_web.war file.
Besides, I put the sui_ejb.jar in the CLASSPATH of WebLogic Server in the setEnv.cmd
file.
A piece of code of the ControlAcceso.java servlet follows:
package gov.co.ssp.suin.web;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import javax.naming.*;
import gov.co.ssp.suin.ejb.ServiciosAutenticacionHome ;
import gov.co.ssp.suin.ejb.ServiciosAutenticacion ;
import gov.co.ssp.suin.comun.* ;
import gov.co.ssp.suin.ejb.ServiciosAutenticacionHome ;
public class ControlAcceso extends HttpServlet {
ServiciosAutenticacion servAutenticacion;
HttpSession session ;
* Initialize global variables
public void init(ServletConfig config) throws ServletException {
super.init(config);
try{
Context ctx = new InitialContext();
ServiciosAutenticacionHome home = (ServiciosAutenticacionHome) ctx.lookup("ServiciosAutenticacion.ServiciosAutenticacionHome");
servAutenticacion = home.create();
} catch ( java.rmi.RemoteException re ) {
System.out.println("ControlAcceso.init: Excepcion RemoteException: ####
" + re.getMessage() );
throw new ServletException(re);
catch (javax.naming.NamingException ne) {
System.out.println("ControlAcceso.init: Excepcion NamingException: ####
" + ne.getMessage() );
javax.naming.Name name = ne.getRemainingName();
for (Enumeration e = name.getAll() ; e.hasMoreElements() ;) {
System.out.println(e.nextElement());
throw new ServletException(ne);
catch(Exception e){
System.out.println("ControlAcceso.init: #######" + e.getMessage() );
throw new ServletException(e);
Any help is really appreciated.
Regards.
- Ricardo De la Rosa (Colombia)
[NoClassDefFoundError.txt]

Answer 1

You're welcome. Glad to help.
Regards,
Slava Imeshev
"Ricardo De la Rosa" <[email protected]> wrote in message
news:[email protected]...
>
Slava,
Thank you very much.
Your answer (and clues) were the solution to my problem.
Best regards from Colombia !
- Ricardo.
"Slava Imeshev" <[email protected]> wrote:
Hi Ricardo,
NoClassDefFoundError means that though the classloader
has been able to find ServiciosAutenticacionHome, it's not
been able to locate supporting classes or interfaces used by
ServiciosAutenticacionHome. Make sure your ejb-jar contains
all necessary classes.
Regards,
Slava Imeshev
"Ricardo De la Rosa" <[email protected]> wrote in message
news:[email protected]...
Hi,
I send a request to a servlet named "ControlAcceso".
The WebLogic server prints:
Error loading servlet: 'ControlAcceso'
java.lang.NoClassDefFoundError:gov/co/ssp/suin/ejb/ServiciosAutenticacionHome
at
gov.co.ssp.suin.web.ControlAcceso.init(ControlAcceso.java:23)
>>>
I have an EJB that has a home interface namedgov.co.ssp.suin.ejb.ServiciosAutenticacionHome;
the file ServiciosAutenticacionHome.class is located in a directorynamed
/gov/co/ssp/suin/ejb
in a sui_ejb.jar file and in a sui_web.war file.
Besides, I put the sui_ejb.jar in the CLASSPATH of WebLogic Serverin the
setEnv.cmd
file.
A piece of code of the ControlAcceso.java servlet follows:
package gov.co.ssp.suin.web;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import javax.naming.*;
import gov.co.ssp.suin.ejb.ServiciosAutenticacionHome ;
import gov.co.ssp.suin.ejb.ServiciosAutenticacion ;
import gov.co.ssp.suin.comun.* ;
import gov.co.ssp.suin.ejb.ServiciosAutenticacionHome ;
public class ControlAcceso extends HttpServlet {
ServiciosAutenticacion servAutenticacion;
HttpSession session ;
* Initialize global variables
public void init(ServletConfig config) throws ServletException {
super.init(config);
try{
Context ctx = new InitialContext();
ServiciosAutenticacionHome home = (ServiciosAutenticacionHome)ctx.lookup("ServiciosAutenticacion.ServiciosAutenticacionHome");
servAutenticacion = home.create();
} catch ( java.rmi.RemoteException re ) {
System.out.println("ControlAcceso.init: Excepcion
RemoteException:
" + re.getMessage() );
throw new ServletException(re);
catch (javax.naming.NamingException ne) {
System.out.println("ControlAcceso.init: Excepcion
NamingException:
" + ne.getMessage() );
javax.naming.Name name = ne.getRemainingName();
for (Enumeration e = name.getAll() ; e.hasMoreElements() ;) {
System.out.println(e.nextElement());
throw new ServletException(ne);
catch(Exception e){
System.out.println("ControlAcceso.init: #######" + e.getMessage());
throw new ServletException(e);
Any help is really appreciated.
Regards.
- Ricardo De la Rosa (Colombia)