[SOLR-5715] CloudSolrServer should choose URLs that match _route_

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.6.1
• Fix Version/s: 4.8, 6.0
• Component/s: clients - java
• Assignee: Noble Paul
• Reporter: Chase Bradford
• Created: 12/Feb/14 00:07
• Updated: 09/May/16 18:47
• Resolved: 20/Mar/14 10:55

Description

When using CloudSolrServer to issue a request with a route param, the URLs passed to LBHttpSolrServer should be filtered to include only hosts serving a slice. If there's a single shard listed, then the query can be served directly. Otherwise, the cluster services 3 /select requests for the query. As the host to replica ratio increases the probability of needing an extra hop goes to one, putting unnecessary strain on the cluster's network.