I have a 3 node solrcloud cluster with 3 shards for each collection/core. At times when I rebuild the index say on collectionA on nodeA (shard1) via UpdateCSV, the "Cloud" status page says that collectionA on nodeA (shard1) is down.
Observations: 1. Other collections on nodeA work. 2. collectionA on nodeB and nodeC works. 3. nodeA's solr admin is accessible too. So my questions are: 1. What does it really mean when a shard goes down? 2. How can I recover from that state? Solr cloud screenshot: http://i.imgur.com/2TgKXiC.png -- Thanks, -Utkarsh