When something goes wrong when Spring initializes its beans, then you often get very long stack traces with multiple "caused by" messages. Often you can find the ultimate cause of the problem by looking at the last of these messages, at the bottom of the long stack trace. So, start looking there to find out what's wrong.
Sumit Gautam wrote: nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '..........Service' defined in ServletContext resource [/WEB-INF/mss-service.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean
Spring's application context is an object factory. When it tries to produce a new object, it fails.
Please check your configuration file, something is mis-configured there in terms of defining one of the Spring beans wired in there by XML markup (or by an annotation if you're using those).
With best regards,