title: Mule version compatibility issue
body: <p>I am getting error (Optional Data Exception) while calling an mule application which is deployed in 3.4.0 mule server from an mule application deployed in 3.4.1 mule server.</p>
  
  <p>Following is a sample description to explain the issue:</p>
  
  <p>One Mule project (named: GetEmployeeData) which fetches data from database is deployed in mule server with version 3.4.0. The endpoints exposed is HTTP for this project.</p>
  
  <p>Another mule project (named EmployeeManagement) is internally hitting (calling) the HTTP endpoints of GetEmployeeData project.</p>
  
  <p>Project EmployeeManagement is deployed in mule server with version 3.4.1. </p>
  
  <p>When EmployeeManagement project hits the GetEmployeeData project, the HTTP response it returns is OptionalDataException.</p>
  
  <p>For workaround, we changed the jar file:mule-core-3.4.1.jar in the mule server 3.4.1 to mule-core-3.4.0.jar, then the HTTP response from GetEmployeeData works fine.</p>
  
  <p>Please reply if somebody faced similar issue like this and is it a known issue. In my case, i am hitting a third party service, so i can't tell them to upgrade there application to 3.4.1. Also, do i need to change anything around my process to get proper response.</p>