title: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext
body: <p>I am struggling with a NoClassDefFound exception in access to spring-social linked in and facebook. What is strange is I have a project which works using the same code for connexion and one which does nt. I have gone thru the differences between the 2 of them and doesnt see any which makes sense to me.</p>
  
  <p>Here is the full trace I get. Any hint or search direction is welcome.</p>
  
  <pre><code>    type Exception report
      message Handler processing failed; nested exception is java.lang.NoClassDefFoundError:     org/apache/http/client/protocol/HttpClientContext
  
      description The server encountered an internal error that prevented it from fulfilling this request.exception
  
  org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext
      org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1259)
      org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
      org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
      org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
      org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
      org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
      org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
      org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
      org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
  
  root cause
  
  java.lang.NoClassDefFoundError: org/apache/http/client/protocol/HttpClientContext
      org.springframework.social.support.ClientHttpRequestFactorySelector$HttpComponentsClientRequestFactoryCreator$1.createHttpContext(ClientHttpRequestFactorySelector.java:80)
      org.springframework.http.client.HttpComponentsClientHttpRequestFactory.createRequest(HttpComponentsClientHttpRequestFactory.java:134)
      org.springframework.http.client.support.HttpAccessor.createRequest(HttpAccessor.java:76)
      org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:484)
      org.springframework.web.client.RestTemplate.execute(RestTemplate.java:452)
      org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:302)
      org.springframework.social.oauth2.OAuth2Template.postForAccessGrant(OAuth2Template.java:232)
      org.springframework.social.oauth2.OAuth2Template.exchangeForAccess(OAuth2Template.java:142)
      org.springframework.social.connect.web.ConnectSupport.completeConnection(ConnectSupport.java:151)
      org.springframework.social.connect.web.ConnectController.oauth2Callback(ConnectController.java:250)
      sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      java.lang.reflect.Method.invoke(Method.java:606)
      org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
      org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
      org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
      org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
      org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
      org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
      org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
      org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
      org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
      org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
      org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
      org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
      org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
      org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
  
  note The full stack trace of the root cause is available in the Apache Tomcat/7.0.37 logs.
  </code></pre>