title: Graphite : invalid line received from client (codahale metrics)
body: <p>I received errors in carbon when trying to using <a href="http://metrics.dropwizard.io/3.1.0/manual/graphite/" rel="nofollow noreferrer">metrics for graphite</a> :</p>
  
  <pre><code>[listener] invalid line received from client HOST:PORT, ignoring
  </code></pre>
  
  <p>So, I tried to add some logs in /opt/graphite/lib/carbon/protocols.py like <a href="https://stackoverflow.com/a/27386026/1991579">this</a>.</p>
  
  <p>And I see in logs this errors:</p>
  
  <pre><code>28/07/2015 10:21:14 :: [listener] invalid line - [ tta(S'com.unnyworld.db.dbclient.request_time.auth.max' ]
  28/07/2015 10:21:14 :: [listener] invalid line - [ (L1438078874L ]
  28/07/2015 10:21:14 :: [listener] invalid line - [ S'5' ]
  </code></pre>
  
  <p>And if we looking for normal request, it looks like:</p>
  
  <pre><code>28/07/2015 10:31:07 :: [listener] nice line - [ stats.counters.statsd.bad_lines_seen.rate 0 1438079468 ]
  </code></pre>
  
  <p>What's problem here? Is it carbon problem? Or is it metrics problem? And how can I resolve it?</p>
  
  <p>Metrics version is 3.1.2</p>
  
  <p>Carbon version 0.9.x</p>