starting Tomcat

I look at logs, my guess is the problem is with context setup in server.xml
:
//////////////////// HERE IS A SNIPPET FROM server.xml FILE //////////////////
<Context path="/webapp000" docBase="webapp000">
<Resource name="jdbc/webapp000" scope="Shareable" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/webapp000">
...
...
</Context>

2005-10-23 15:25:12 StandardContext[/webapp000]: Error configuring application listener of class listeners.SessionListener
java.lang.ClassFormatError: Illegal class name "WEB-INF/classes/listeners/SessionListener" in class file listeners/SessionListener
      at java.lang.ClassLoader.defineClass1(Native Method)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
      at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
      at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1649)
      at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:931)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1373)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1252)
      at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3179)
      at org.apache.catalina.core.StandardContext.start(StandardContext.java:3554)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1141)
      at org.apache.catalina.core.StandardHost.start(StandardHost.java:707)
      at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1141)
      at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:316)
      at org.apache.catalina.core.StandardService.start(StandardService.java:450)
      at org.apache.catalina.core.StandardServer.start(StandardServer.java:2143)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:463)
      at org.apache.catalina.startup.Catalina.execute(Catalina.java:350)
      at org.apache.catalina.startup.Catalina.process(Catalina.java:129)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:585)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:156)

2005-10-23 15:25:12 StandardContext[/webapp000]: Skipped installing application listeners due to previous error(s)
2005-10-23 15:25:12 StandardContext[/webapp000]: Context startup failed due to previous errors

What version of tomcat is this?  If you remove the webapp "webapp000" does the server start?

Is webapp000 an application you have the source for?  If so, what package does the listener.SessionListener say it is in?

Do you have :

<listener>    
      <listener-class>listeners.SessionListener</listener-class>  
</listener>

in your web.xml?

Remove these lines and try to start tomcat again.

BTW: if so , o you have this class in classes or lib jar files?

Acton
 

>What version of tomcat is this?
4.1.31

> If you remove the webapp "webapp000" does the server start?
You are for that, if i remove "webapp000" it starts fine.

>what does your web.xml look like?
/////////////////// web.xml ///////////////////////////
<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

    <display-name>Tomcat Examples</display-name>
    <description>
      Tomcat Example servlets and JSP pages.
    </description>

    <!-- Define servlet-mapped and path-mapped example filters -->
    <filter>
        <filter-name>Servlet Mapped Filter</filter-name>
        <filter-class>filters.ExampleFilter</filter-class>
      <init-param>
          <param-name>attribute</param-name>
          <param-value>filters.ExampleFilter.SERVLET_MAPPED</param-value>
      </init-param>
    </filter>
    <filter>
        <filter-name>Path Mapped Filter</filter-name>
        <filter-class>filters.ExampleFilter</filter-class>
      <init-param>
          <param-name>attribute</param-name>
          <param-value>filters.ExampleFilter.PATH_MAPPED</param-value>
      </init-param>
    </filter>
    <filter>
        <filter-name>Request Dumper Filter</filter-name>
        <filter-class>filters.RequestDumperFilter</filter-class>
    </filter>

    <!-- Example filter to set character encoding on each request -->
    <filter>
        <filter-name>Set Character Encoding</filter-name>
        <filter-class>filters.SetCharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>EUC_JP</param-value>
        </init-param>
    </filter>

    <filter>
        <filter-name>Compression Filter</filter-name>
        <filter-class>compressionFilters.CompressionFilter</filter-class>

        <init-param>
          <param-name>compressionThreshold</param-name>
          <param-value>10</param-value>
        </init-param>
        <init-param>
          <param-name>debug</param-name>
          <param-value>0</param-value>
        </init-param>
    </filter>

    <!-- Define filter mappings for the defined filters -->
    <filter-mapping>
        <filter-name>Servlet Mapped Filter</filter-name>
      <servlet-name>invoker</servlet-name>
    </filter-mapping>
    <filter-mapping>
        <filter-name>Path Mapped Filter</filter-name>
      <url-pattern>/servlet/*</url-pattern>
    </filter-mapping>


<!-- Example filter mapping to apply the "Set Character Encoding" filter
     to *all* requests processed by this web application -->
<!--
    <filter-mapping>
        <filter-name>Set Character Encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
-->

<!--
    <filter-mapping>
      <filter-name>Compression Filter</filter-name>
      <url-pattern>/CompressionTest</url-pattern>
    </filter-mapping>
-->

<!--
    <filter-mapping>
        <filter-name>Request Dumper Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
-->

    <!-- Define example application events listeners -->
    <listener>
        <listener-class>listeners.ContextListener</listener-class>
    </listener>
    <listener>
        <listener-class>listeners.SessionListener</listener-class>
    </listener>

    <!-- Define servlets that are included in the example application -->

    <servlet>
        <servlet-name>SendMailServlet</servlet-name>
        <servlet-class>SendMailServlet</servlet-class>
    </servlet>

    <servlet>
        <servlet-name>
            snoop
        </servlet-name>
        <servlet-class>
            SnoopServlet
        </servlet-class>
<!--
        <init-param>
            <param-name>foo</param-name>
            <param-value>bar</param-value>
        </init-param>
-->
        <run-as>
            <description>Security role for anonymous access</description>
            <role-name>tomcat</role-name>
        </run-as>
    </servlet>

    <servlet>
      <servlet-name>
          servletToJsp
      </servlet-name>
      <servlet-class>
          servletToJsp
      </servlet-class>
    </servlet>
        <servlet>
        <servlet-name>
            CompressionFilterTestServlet
        </servlet-name>
        <servlet-class>
            compressionFilters.CompressionFilterTestServlet
        </servlet-class>

    </servlet>

    <servlet-mapping>
        <servlet-name>invoker</servlet-name>
        <url-pattern>/servlet/*</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>
            CompressionFilterTestServlet
        </servlet-name>
        <url-pattern>
            /CompressionTest
        </url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>SendMailServlet</servlet-name>
        <url-pattern>/SendMailServlet</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>
            snoop
        </servlet-name>
        <url-pattern>
            /snoop
        </url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>
            servletToJsp
        </servlet-name>
        <url-pattern>
            /servletToJsp
        </url-pattern>
    </servlet-mapping>

    <taglib>
        <taglib-uri>
         http://jakarta.apache.org/tomcat/debug-taglib
        </taglib-uri>
        <taglib-location>
           /WEB-INF/jsp/debug-taglib.tld
        </taglib-location>
    </taglib>

    <taglib>
        <taglib-uri>
         http://jakarta.apache.org/tomcat/examples-taglib
        </taglib-uri>
        <taglib-location>
           /WEB-INF/jsp/example-taglib.tld
        </taglib-location>
    </taglib>

    <resource-ref>
      <res-ref-name>mail/Session</res-ref-name>
      <res-type>javax.mail.Session</res-type>
      <res-auth>Container</res-auth>
    </resource-ref>

    <security-constraint>
      <display-name>Example Security Constraint</display-name>
      <web-resource-collection>
         <web-resource-name>Protected Area</web-resource-name>
       <!-- Define the context-relative URL(s) to be protected -->
         <url-pattern>/jsp/security/protected/*</url-pattern>
       <!-- If you list http methods, only those methods are protected -->
       <http-method>DELETE</http-method>
         <http-method>GET</http-method>
         <http-method>POST</http-method>
       <http-method>PUT</http-method>
      </web-resource-collection>
      <auth-constraint>
         <!-- Anyone with one of the listed roles may access this area -->
         <role-name>tomcat</role-name>
       <role-name>role1</role-name>
      </auth-constraint>
    </security-constraint>

    <!-- Default login configuration uses form-based authentication -->
    <login-config>
      <auth-method>FORM</auth-method>
      <realm-name>Example Form-Based Authentication Area</realm-name>
      <form-login-config>
        <form-login-page>/jsp/security/protected/login.jsp</form-login-page>
        <form-error-page>/jsp/security/protected/error.jsp</form-error-page>
      </form-login-config>
    </login-config>

    <!-- Security roles referenced by this web application -->
    <security-role>
      <role-name>role1</role-name>
    </security-role>
    <security-role>
      <role-name>tomcat</role-name>
    </security-role>

    <!-- Environment entry examples -->
    <!--env-entry>
      <env-entry-description>
         The maximum number of tax exemptions allowed to be set.
      </env-entry-description>
      <env-entry-name>maxExemptions</env-entry-name>
      <env-entry-value>15</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry-->
    <env-entry>
      <env-entry-name>minExemptions</env-entry-name>
      <env-entry-value>1</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/name1</env-entry-name>
      <env-entry-value>value1</env-entry-value>
      <env-entry-type>java.lang.String</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/bar/name2</env-entry-name>
      <env-entry-value>true</env-entry-value>
      <env-entry-type>java.lang.Boolean</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>name3</env-entry-name>
      <env-entry-value>1</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>
    <env-entry>
      <env-entry-name>foo/name4</env-entry-name>
      <env-entry-value>10</env-entry-value>
      <env-entry-type>java.lang.Integer</env-entry-type>
    </env-entry>

    <!-- EJB Reference -->
    <ejb-ref>
      <description>Example EJB Reference</description>
      <ejb-ref-name>ejb/Account</ejb-ref-name>
      <ejb-ref-type>Entity</ejb-ref-type>
      <home>com.mycompany.mypackage.AccountHome</home>
      <remote>com.mycompany.mypackage.Account</remote>
    </ejb-ref>

    <!-- Local EJB Reference -->
    <ejb-local-ref>
      <description>Example Local EJB Reference</description>
      <ejb-ref-name>ejb/ProcessOrder</ejb-ref-name>
      <ejb-ref-type>Session</ejb-ref-type>
      <local-home>com.mycompany.mypackage.ProcessOrderHome</local-home>
      <local>com.mycompany.mypackage.ProcessOrder</local>
    </ejb-local-ref>


</web-app>

 

>>
Do you have :

<listener>    
     <listener-class>listeners.SessionListener</listener-class>  
</listener>

>>
yes

The problem appears to be in your listeners.SessionListener class.  Can you provide that source code?

Hi, komalaaa:

          If I am right, did you copy <tomcat>\webapps\examples\WEB-INF\web.xml into your webapp000\WEB-INFO\ directory?

          There are a lot of specific configurations in this web.xml. You might not be able to simply copy it into your own webapp without some modification. For this error, I guess under your own webapp000\WEB-INFO\classes, you don't have listeners directory which should include ContextListener.class and SessionListener.class.  

         This should be the reason for your error.

          I already pointed it out to you  and let you check on those classes on your classes directory.

         If you really want to borrow some functions from samples app or build yours from it, you can simply add your classes or jsp files into examples directory. Also you can be free to change the examples directory as your "webapp000".

Acton
         

>The problem appears to be in your listeners.SessionListener class.  Can you provide that source code?

/*
 * Copyright 1999,2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package listeners;


import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;


/**
 * Example listener for context-related application events, which were
 * introduced in the 2.3 version of the Servlet API.  This listener
 * merely documents the occurrence of such events in the application log
 * associated with our servlet context.
 *
 * @author Craig R. McClanahan
 * @version $Revision: 1.3 $ $Date: 2004/08/26 22:03:27 $
 */

public final class SessionListener
    implements ServletContextListener,
             HttpSessionAttributeListener, HttpSessionListener {


    // ----------------------------------------------------- Instance Variables


    /**
     * The servlet context with which we are associated.
     */
    private ServletContext context = null;


    // --------------------------------------------------------- Public Methods


    /**
     * Record the fact that a servlet context attribute was added.
     *
     * @param event The session attribute event
     */
    public void attributeAdded(HttpSessionBindingEvent event) {

      log("attributeAdded('" + event.getSession().getId() + "', '" +
          event.getName() + "', '" + event.getValue() + "')");

    }


    /**
     * Record the fact that a servlet context attribute was removed.
     *
     * @param event The session attribute event
     */
    public void attributeRemoved(HttpSessionBindingEvent event) {

      log("attributeRemoved('" + event.getSession().getId() + "', '" +
          event.getName() + "', '" + event.getValue() + "')");

    }


    /**
     * Record the fact that a servlet context attribute was replaced.
     *
     * @param event The session attribute event
     */
    public void attributeReplaced(HttpSessionBindingEvent event) {

      log("attributeReplaced('" + event.getSession().getId() + "', '" +
          event.getName() + "', '" + event.getValue() + "')");

    }


    /**
     * Record the fact that this web application has been destroyed.
     *
     * @param event The servlet context event
     */
    public void contextDestroyed(ServletContextEvent event) {

      log("contextDestroyed()");
      this.context = null;

    }


    /**
     * Record the fact that this web application has been initialized.
     *
     * @param event The servlet context event
     */
    public void contextInitialized(ServletContextEvent event) {

      this.context = event.getServletContext();
      log("contextInitialized()");

    }


    /**
     * Record the fact that a session has been created.
     *
     * @param event The session event
     */
    public void sessionCreated(HttpSessionEvent event) {

      log("sessionCreated('" + event.getSession().getId() + "')");

    }


    /**
     * Record the fact that a session has been destroyed.
     *
     * @param event The session event
     */
    public void sessionDestroyed(HttpSessionEvent event) {

      log("sessionDestroyed('" + event.getSession().getId() + "')");

    }


    // -------------------------------------------------------- Private Methods


    /**
     * Log a message to the servlet context application log.
     *
     * @param message Message to be logged
     */
    private void log(String message) {

      if (context != null)
          context.log("SessionListener: " + message);
      else
          System.out.println("SessionListener: " + message);

    }


    /**
     * Log a message and associated exception to the servlet context
     * application log.
     *
     * @param message Message to be logged
     * @param throwable Exception to be logged
     */
    private void log(String message, Throwable throwable) {

      if (context != null)
          context.log("SessionListener: " + message, throwable);
      else {
          System.out.println("SessionListener: " + message);
          throwable.printStackTrace(System.out);
      }

    }


}

Hi, komlaaa:

            Did you check my last post?
            Should be no problem with this source code.  Tomcat internal web classloader couldn't find this class under WEB-INF\classes.
            It is similar to "No Class Found" error but since Tomcat has its own classloader and also you should not have lib directory so it only searchs for WEB-INFO\classes for listener classess.

Acton

komlaaa,

      You also can use simple web.xml  I gave to you in your last related question as your start point to your application.

      Every element in your web.xml takes some meaning ...

      You might refer to this doc to configure your web.xml step by step:

      http://e-docs.bea.com/wls/docs61/webapp/web_xml.html


Acton

>...it only searchs for WEB-INFO\classes for listener classess
But do i have to have that The listner anse Session classes in order for my webapp to work?

Typo
*anse ===> should be and

You need the listener classes or you need to comment that part of the web.xml out:

<!--
   <listener>
        <listener-class>listeners.ContextListener</listener-class>
    </listener>
    <listener>
        <listener-class>listeners.SessionListener</listener-class>
    </listener>
-->

see my previous post, I already answered this :)


>>>>>>>>>>>>>>>
 Do you have :

<listener>    
     <listener-class>listeners.SessionListener</listener-class>  
</listener>

in your web.xml?

Remove these lines and try to start tomcat again.

BTW: if so , o you have this class in classes or lib jar files?

Acton

Hey,komlaaa

As you requested, here is a link.

    http://java.sun.com/j2ee/1.4/docs/tutorial/doc/

Acton