title: Symfony 4 getting multiple cache.WARNING Failed to save key
body: <p>I've been setting up both skeleton and web-skeleton new projects using the latest version of symfony.
  In both of them, but not in the symfony-demo application, I am getting tons of warning lines on the logs whenever i take any action in the apps.</p>
  
  <p>The warnings show both while running the web-server or Apache.</p>
  
  <p>log warnings all look like the following all of them pointing to fylesystemCommonTrait.php:</p>
  
  <p><strong>cache.WARNING: Failed to save key ..... (ErrorException(code: 0): touch(): Utime failed: No such file or directory at ..... vendor\symfony\cache\Traits\FilesystemCommonTrait.php:90</strong></p>
  
  <p>In crud operations i usally get hundreds of warnings each time.</p>
  
  <p>Sample logs from a simple hello controller:
  <em>[2018-03-25 21:03:24] request.INFO: Matched route "hello". {"route":"hello","route_parameters":{"_controller":"App\Controller\DefaultController::hello","_route":"hello"},"request_uri":"<a href="http://localhost/symfony/symwebcrud/public/" rel="nofollow noreferrer">http://localhost/symfony/symwebcrud/public/</a>","method":"GET"} []
  [2018-03-25 21:03:24] security.INFO: Populated the TokenStorage with an anonymous Token. [] []
  [2018-03-25 21:03:24] cache.WARNING: Failed to save key "%5BApp%5CController%5CDefaultController%5D%5B1%5D" (array) {"key":"%5BApp%5CController%5CDefaultController%5D%5B1%5D","type":"array","exception":"[object] (ErrorException(code: 0): touch(): Utime failed: No such file or directory at E:\Development\Symfony\symwebcrud\vendor\symfony\cache\Traits\FilesystemCommonTrait.php:90)"} []
  [2018-03-25 21:03:24] cache.WARNING: Failed to save key "%5B%5BC%5DApp%5CController%5CDefaultController%5D%5B1%5D" (integer) {"key":"%5B%5BC%5DApp%5CController%5CDefaultController%5D%5B1%5D","type":"integer","exception":"[object] (ErrorException(code: 0): touch(): Utime failed: No such file or directory at E:\Development\Symfony\symwebcrud\vendor\symfony\cache\Traits\FilesystemCommonTrait.php:90)"} []
  [2018-03-25 21:03:24] cache.WARNING: Failed to save key "%5BApp%5CController%5CDefaultController%23hello%5D%5B1%5D" (array) {"key":"%5BApp%5CController%5CDefaultController%23hello%5D%5B1%5D","type":"array","exception":"[object] (ErrorException(code: 0): touch(): Utime failed: No such file or directory at E:\Development\Symfony\symwebcrud\vendor\symfony\cache\Traits\FilesystemCommonTrait.php:90)"} []
  [2018-03-25 21:03:24] cache.WARNING: Failed to save key "%5B%5BC%5DApp%5CController%5CDefaultController%23hello%5D%5B1%5D" (integer) {"key":"%5B%5BC%5DApp%5CController%5CDefaultController%23hello%5D%5B1%5D","type":"integer","exception":"[object] (ErrorException(code: 0): touch(): Utime failed: No such file or directory at E:\Development\Symfony\symwebcrud\vendor\symfony\cache\Traits\FilesystemCommonTrait.php:90)"} []</em></p>