title: Elasticsearch some indices unassigned after a brain-split happened
body: <p>Using ES 1.3.1 version
  Found a brain-split then restart the entire cluster. Now only the latest index got correctly allocated, leave all other indices unassigned...
  I've checked on several nodes, there are index data saved on disk, and I've tried to restart those nodes, still won't get a shard allocate...
  Please see this screen shot:
  <a href="http://i.stack.imgur.com/d6jT7.png" rel="nofollow">http://i.stack.imgur.com/d6jT7.png</a></p>
  
  <p>I've tried the "Cluster reroute":　<a href="http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/cluster-reroute.html" rel="nofollow">http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/cluster-reroute.html</a>. However, got  a exception like "cannot allocate Primary Shard"...</p>
  
  <p>Please help and any comment is welcome. Thanks a lot.</p>