Spring Social on Google AppEngine

If you run into the 

javax.net.ssl.HttpsURLConnection is a restricted class

issues using Spring Social on Google AppEngine, please note that ClientHttpRequestFactorySelector 

"Picks a HttpComponentsClientRequestFactory factory if Apache HttpComponents HttpClient is in the classpath. If not, falls back to SimpleClientHttpRequestFactory."

So check your classpath! Avoid HttpClient on AppEngine!