title: HTTP 400 following validation failure Spring MVC
body: <p>We are using Spring MVC 3.2.4 with spring form tags and JSTL core tags inside a multipart form (for optional file upload). We have a form backing object for view binding that is passed via the controller. This form object is then validated in a custom validator implementing the Spring Framework Validator.</p>
  
  <p>When a user submits the form without a required field the form is returned with errors via  . When the user corrects the missing field and resubmits the response is a 400 error stating "The request sent by the client was syntactically incorrect()." with no additional stacktrace or error. </p>
  
  <p>This behavior is further isolated to form elements that are bound to List objects rather than String objects (i.e. <code>&lt;input name="address[x]" /&gt;</code> where x is the number of address inputs). Has anyone seen similar behavior?</p>
  
  <p>Regards</p>