[Struts2] cannot access a mapped servlet when using /* for the struts filter

[Dasgupta, Ranjan]

ver 2.1.2. Running under jdev 10.1.3

Here's the original web.xml snippet

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>ERROR</dispatcher>
    </filter-mapping>

    <servlet>
        <servlet-name>TestServlet</servlet-name>
        <servlet-class>wf.feed.servlet.TestServlet</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>TestServlet</servlet-name>
        <url-pattern>/testservlet</url-pattern>
    </servlet-mapping>

When I try to access http://localhost:7779/app/testservlet, the struts2 
dispatcher is getting invoked, and returns an error that it cannot find the 
action:
There is no Action mapped for namespace / and action name testservlet. - 
[unknown location]
        at com.opensymphony.xwork2.XWorkException.<init>(XWorkException.java:35)
        at 
com.opensymphony.xwork2.config.ConfigurationException.<init>(ConfigurationException.java:30)
        at 
com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:178)
        at 
org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
        at 
org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
        at 
com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)
        at 
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:467)
        at 
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:467)

So I ended up with modifying the <filter-mapping>, and this takes care of the 
problem
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*.action</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>ERROR</dispatcher>
    </filter-mapping>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*.jsp</url-pattern>
        <dispatcher>REQUEST</dispatcher><!-- i guess this can be removed -->
        <dispatcher>ERROR</dispatcher><!-- i guess this can be removed -->
    </filter-mapping>

Has anybody faced this issue, and found a different resolution?

Thanks,
-Ranjan