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I was able to check whether the class (ContextLoaderListener) is copied in
different places.
I can confirm that the class is only located in my webapp under WEB-INF/lib.
(Inside spring.jar and spring-web.jar).

The mystery gets bigger and bigger for me :)

To resume, my Tomcat works most of the time, but sometimes when I start I
get a ListenerStart Error because of a ClassDefNotFound error referencing
org.springframework.web.context.ContextLoaderListener.

Note. This happens after stopping and starting Tomcat again. I'm not
deploying any newer libraries or whatsoever.
In case it's useful, the web.xml of the webapp:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <display-name>pack-server</display-name>

    <distributable />

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <context-param>

<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
        <param-value>messages</param-value>
    </context-param>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:applicationContext-pack-base.xml,
            /WEB-INF/classes/applicationContext-services.xml,
            /WEB-INF/classes/applicationContext-security.xml

        </param-value>
    </context-param>

    <context-param>
        <param-name>log4jExposeWebAppRoot</param-name>
        <param-value>false</param-value>
    </context-param>

    <filter>
        <filter-name>springSecurityFilterChain</filter-name>

<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>

    </filter>

    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>FORWARD</dispatcher>
    </filter-mapping>

    <filter>
        <filter-name>Execution Context Filter</filter-name>

<filter-class>de.ja.sap.pack.controller.ExecutionContextFilter</filter-class>

    </filter>

    <filter-mapping>
        <filter-name>Execution Context Filter</filter-name>
        <url-pattern>*.do</url-pattern>
    </filter-mapping>

    <listener>

<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>

    </listener>

    <listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

    <listener>

<listener-class>de.ja.sap.pack.listener.InitListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>action</servlet-name>

<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
        <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/struts-config.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>action</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

    <servlet>
        <display-name>Apache-Axis Servlet</display-name>
        <servlet-name>AxisServlet</servlet-name>

<servlet-class>org.apache.axis2.transport.http.AxisServlet</servlet-class>
    </servlet>

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

    <servlet-mapping>
        <servlet-name>AxisServlet</servlet-name>
        <url-pattern>*.jws</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>AxisServlet</servlet-name>
        <url-pattern>/services/*</url-pattern>
    </servlet-mapping>

    <servlet>
        <display-name>Apache-Axis Admin Servlet Web Admin</display-name>
        <servlet-name>AxisAdminServlet</servlet-name>

<servlet-class>org.apache.axis2.transport.http.AxisAdminServlet</servlet-class>

        <load-on-startup>100</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>AxisAdminServlet</servlet-name>
        <url-pattern>/axis2-admin/*</url-pattern>
    </servlet-mapping>

    <filter>
        <filter-name>Navegation PACK Filter</filter-name>
        <filter-class>de.ja.sap.pack.web.NavegationPACKFilter</filter-class>

    </filter>
    <filter-mapping>
        <filter-name>Navegation PACK Filter</filter-name>
        <url-pattern>*</url-pattern>
    </filter-mapping>

</web-app>

2009/10/3 Caldarale, Charles R <Chuck.Caldarale@unisys.com>

> > From: Bocalinda [mailto:bocalinda@gmail.com]
> > Subject: Re: Connection between ListenerStart and clustering
> >
> > > it turns out there are 2 libraries in my web-inf/lib
> > > containing a class definition for that:
> > >
> > > spring-2.5.6.jar and spring-web-2.5.6.jar
> > >
> > > Maybe one is interfering with the other
>
> Is one a proper subset of the other?  If so, it can be removed without ill
> effect.
>
> > they both need to be there in order for Spring to work.
>
> I'm not familiar with Spring so, I can't really comment.  Others on the
> list do have experience in that area.
>
>  - Chuck
>
>
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