title: Error when starting Memcached: failed to listen
body: <p>I have run Memcached on my Server for 2 month. Yesterday it stopped working. No idea why. So I tried:</p>
  
  <pre><code>root@xyz:~# killall memcached
  root@xyz:~# /etc/init.d/memcached stop
  Stopping memcached: memcached.
  root@xyz:~# memcached -d -m 128 -l 127.0.0.1 -p 11211 -vv -u www-data
  bind(): Address already in use
  failed to listen
  root@xyz:~# memcached -u www-data -vv
  bind(): Address already in use
  failed to listen
  </code></pre>
  
  <p>Any idea?</p>