title: Flower doesn't display all workers for celery
body: <p>I am running celery on two servers with one redis as a broker.</p>
  
  <p>Celery start command looks like following:</p>
  
  <pre><code>celery multi start 2 -A app_name
  </code></pre>
  
  <p>Flower start command:</p>
  
  <pre><code>celery flower -A app_name --address=10.41.31.210 --port=5555
  </code></pre>
  
  <p>In flower's output there are some warnings:</p>
  
  <pre><code>WARNING:flower.api.control:'stats' inspect method failed
  WARNING:flower.api.control:'active_queues' inspect method failed
  WARNING:flower.api.control:'registered' inspect method failed
  WARNING:flower.api.control:'scheduled' inspect method failed
  WARNING:flower.api.control:'active' inspect method failed
  WARNING:flower.api.control:'reserved' inspect method failed
  WARNING:flower.api.control:'revoked' inspect method failed
  WARNING:flower.api.control:'conf' inspect method failed
  </code></pre>
  
  <p>And the most strange thing for me - not all workers are displayed in Flower's dashboard. Seems that after every flower restart only some workers are displayed. Due to my start scripts - there should be at least 8 workers, but I see 4 or sometimes 6.</p>
  
  <p>Looking for any solution or advice. Thank you.</p>
  
  <p>P.s I don't have any problems with the same services when there is only one server used for celery workers.</p>