title: Amazon S3 and Cloudfront cache, how to clear cache or synchronize their cache
body: <p>I have a cron job that runs every 10 minutes and updates the content-type and x-amz-meta. But since yesterday it seems like after the cron job run, Amazon is not picking up the changes made (refreshing his cache).</p>
  
  <p>I even went and made the changes manually but no change...</p>
  
  <p>When a video is uploaded it has a <code>application/x-mp4</code> content-type and the cron job changes it to <code>video/mp4</code>.</p>
  
  <p>Although S3 has the right content type <code>video/mp4</code> cloudfront shows <code>application/x-mp4</code>(old content-type)     ....          </p>
  
  <p>The cron job has been working for the last 6 months without a problem.    </p>
  
  <p>What is wrong with amazon caching? How can i synchronize the caching?</p>