MicrosoftA 503 Service Unavailable Error is an HTTP response status code indicating that your web server operates properly, but it can't temporarily handle the request at the moment. This error happen for a wide variety of reasons. Normally, this error can be due to a temporary overloading or maintenance being performed on the server and it is resolved after a period of time or once another thread has been released by web-server application. A http://net-informations.com/q/mis/503.html is a temporary condition and the caller should retry after a reasonable period of time. Also check the http response headers for the description of the 503 error.
