Error while request processing in mule application in tomcat 7 server

Question

While request processing mule application giving following exception:- javax.servlet.ServletException: Property mule.context not set on ServletContext. the flow snippet is like below :-

    <logger message="#[message.payloadAs(java.lang.String)]" level="INFO" doc:name="Logger"/>
    <dw:transform-message doc:name="Transform Message" me
    </dw:transform-message>
    <logger message="#[message.payloadAs(java.lang.String)]" level="INFO" doc:name="Logger"/>
</flow>