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java.lang.NoClassDefFoundError: java.net.ProxySelector is a restricted class. Please see the Google  App Engine developer's guide for more details.	at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:52)	at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:1093)	at org.apache.http.impl.client.HttpClients.createSystem(HttpClients.java:66)	at org.springframework.http.client.HttpComponentsClientHttpRequestFactory.(HttpComponentsClientHttpRequestFactory.java:72)	at org.springframework.social.support.ClientHttpRequestFactorySelector$HttpComponentsClientRequestFactoryCreator$1.(ClientHttpRequestFactorySelector.java:91)	at org.springframework.social.support.ClientHttpRequestFactorySelector$HttpComponentsClientRequestFactoryCreator.createRequestFactory(ClientHttpRequestFactorySelector.java:91)	at org.springframework.social.support.ClientHttpRequestFactorySelector.getRequestFactory(ClientHttpRequestFactorySelector.java:64)	at org.springframework.social.oauth2.OAuth2Template.createRestTemplate(OAuth2Template.java:210)	at org.springframework.social.oauth2.OAuth2Template.getRestTemplate(OAuth2Template.java:265)	at org.springframework.social.google.connect.GoogleOAuth2Template.postForAccessGrant(GoogleOAuth2Template.java:48)	at org.springframework.social.oauth2.OAuth2Template.exchangeForAccess(OAuth2Template.java:144)	at org.springframework.social.connect.web.ConnectSupport.completeConnection(ConnectSupport.java:160)	at org.springframework.social.connect.web.ConnectController.oauth2Callback(ConnectController.java:279)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:130)	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at org.springframework.social.connect.web.ReconnectFilter.doFilter(ReconnectFilter.java:99)	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:128)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:50)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)	at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)	at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)	at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:511)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at org.mortbay.jetty.Server.handle(Server.java:326)	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)