title: MySQL Watchdog warnings that disappear on flushing the cache
body: <p>I get following type of warnings on my <strong>Drupal Site</strong> which usually disappear when I flush the cache</p>
  
  <pre><code>"Warning: MySQL server has gone away query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (1, 'php', '%message in %file on line %line.', 
  </code></pre>
  
  <p>Any idea why it happens and how flushing the cache clears it all?</p>
  
  <p>Thanks in advance!</p>