Solution
Please Install the Updated Packages.
Insight
HttpKernel provides the building blocks to create flexible and fast HTTP-based frameworks.
It takes a Request as an input and should return a Response as an output.
Using this interface makes your code compatible with all frameworks using the Symfony2 components. And this will give you many cool features for free.
Optional dependencies: memcache, memcached, mongo
Affected
php-symfony2-HttpKernel on Fedora 17
References
Updated on 2015-03-25