RDSDispatchServlet is not available - apache-flex

Question

I have web.xml as follows
<?xml version="1.0" encoding="UTF-8"?>
<!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>HibDemo</display-name>
<description>HibDemo Application</description>
<!-- Http Flex Session attribute and binding listener support -->
<listener>
<listener-class>flex.messaging.HttpFlexSession</listener-class>
</listener>
<!-- MessageBroker Servlet -->
<servlet>
<servlet-name>MessageBrokerServlet</servlet-name>
<display-name>MessageBrokerServlet</display-name>
<servlet-class>flex.messaging.MessageBrokerServlet</servlet-class>
<init-param>
<param-name>services.configuration.file</param-name>
<param-value>/WEB-INF/flex/services-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>RDSDispatchServlet</servlet-name>
<servlet-class>flex.rds.server.servlet.FrontEndServlet</servlet-class>
<init-param>
<param-name>messageBrokerId</param-name>
<param-value>_messageBroker</param-value>
</init-param>
<init-param>
<param-name>useAppserverSecurity</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>10</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>MessageBrokerServlet</servlet-name>
<url-pattern>/messagebroker/*</url-pattern>
</servlet-mapping>
<servlet-mapping id="RDS_DISPATCH_MAPPING">
<servlet-name>RDSDispatchServlet</servlet-name>
<url-pattern>/CFIDE/main/ide.cfm</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
</welcome-file-list>
<!-- for WebSphere deployment, please uncomment -->
<!--
<resource-ref>
<description>Flex Messaging WorkManager</description>
<res-ref-name>wm/MessagingWorkManager</res-ref-name>
<res-type>com.ibm.websphere.asynchbeans.WorkManager</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
-->
I have downloaded blazeds3.3 and copied all the lib files my lib folder and added the above web.xml file.
Then I have created the Flex 4 project with BlazeDS support. it has been created without any error. Then I have added the datagrid in the code. While using data-centric driven feature of flex 4 it is asking me username and password. I have checked "No Password Require"
Then it gives me Error Like
Error Executing RDS command. Status code 404, Reason: Servlet RDSDispatchServlet is not available
Please help me.

Answer 1

It looks like the RDS stuff isn't in BlazeDS 3.3. As far as I can see, its v4 and above.
So your server is likely not starting the servlet due to the class not being found on the classpath.