Fixing No bean named 'springSecurityFilterChain' is defined - spring

Question

I am getting this problem. Spring security 3.1.3.RELEASEE. This is a simple Spring form based login security. I am getting an exception No bean named 'springSecurityFilterChain' is defined whenever the server is getting started.
WEB.XML -
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring/appServlet/servlet-context.xml,
/WEB-INF/spring/appServlet/login-security.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Spring Security -->
<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>
</filter-mapping>
LOGIN--SECURITY.XML -
<security:http auto-config="true">
<security:intercept-url pattern="/welcome*" access="ROLE_USER" />
<security:form-login login-page="/login" default-target-url="/welcome"
authentication-failure-url="/loginfailed" />
<security:logout logout-success-url="/logout" />
</security:http>
<security:authentication-manager>
<security:authentication-provider>
<security:user-service>
<security:user name="mkyong" password="123456" authorities="ROLE_USER" />
</security:user-service>
</security:authentication-provider>
</security:authentication-manager>
I do not get any warnings either. Can somebody please have a look ?

Answer 1

The DelegatingFilterProxy only has access to the, so called, root application context. Which is the file loaded by the ContextLoaderListener.
So instead of letting the DispatcherServlet load the /WEB-INF/spring/appServlet/login-security.xml move it to the configuration of the ContextLoaderListener.
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml,/WEB-INF/spring/appServlet/login-security.xml</param-value>
</context-param>