title: UnavailableShardsException on ElasticSearch
body: <p>I'm using Elasticsearch on my dedicated server (not amazon). Recently it's giving me error like:</p>
  
  <blockquote>
    <p>UnavailableShardsException[[tribune][4] Primary shard is not active or
    isn't assigned is a known node. Timeout: [1m], request: delete
    {[tribune][news][90755]}]</p>
  </blockquote>
  
  <p>when ever I'm making <strong>/_cat/shards?v</strong> the result is:</p>
  
  <pre><code>index   shard prirep state        docs  store ip            node          
  tribune 4     p      UNASSIGNED                                           
  tribune 4     r      UNASSIGNED                                           
  tribune 0     p      STARTED      5971   34mb ***.**.***.** Benny Beckley 
  tribune 0     r      UNASSIGNED                                           
  tribune 3     p      STARTED      5875 33.9mb ***.**.***.** Benny Beckley 
  tribune 3     r      UNASSIGNED                                           
  tribune 1     p      INITIALIZING             ***.**.***.** Benny Beckley 
  tribune 1     r      UNASSIGNED                                           
  tribune 2     p      STARTED      5875 33.6mb ***.**.***.** Benny Beckley 
  tribune 2     r      UNASSIGNED                                           
  </code></pre>