ConflictingHeadersException
class ConflictingHeadersException extends RuntimeException
The HTTP request contains headers with conflicting information.
This exception should trigger an HTTP 400 response in your application code.
© 2004–2017 Fabien Potencier
Licensed under the MIT License.
http://api.symfony.com/2.7/Symfony/Component/HttpFoundation/Exception/ConflictingHeadersException.html