title: SolrCloud shard recovery
body: <p>I'm a SolrCloud newbie, my setup is 3 shards, 3 replicas, external Zookeeper</p>
  
  <p>Today I found shard3 down, replica3 had taken over as leader, so indexing was occurring to replica3 not shard3. I stopped Tomcat/SOLR in reverse order (R3,R2,R1,S3,S2,S1) and restarted in forward order (S1,S2,S3,R1,R2,R3). I did not delete any tlog or replication.properties files. The cloud graph shows all hosts with their correct assignments. As I understand it these assignments are set in Zookeeper on the first startup.</p>
  
  <p>My question is how does the data that was indexed to replica3 get back to the revived shard3?  </p>
  
  <p>And surprisingly shard3 = 87G while replica3 = 80G.</p>
  
  <p>Confused!</p>