[SOLR-3318] LBHttpSolrClient should allow to specify a preferred server for a query

• Type: Improvement
• Status: Reopened
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 6.3
• Component/s: clients - java
• Assignee: Unassigned
• Reporter: Martin Grotzke
• Created: 04/Apr/12 23:27
• Updated: 02/Oct/19 17:24

Description

For a user query we make several solr queries that differ only slightly and therefore should use/reuse objects cached from the first query (we're using a custom request handler and custom caches).
Thus such subsequent queries should hit the same solr server.

The implemented solution looks like this:

• The client obtains a live SolrServer from LBHttpSolrServer
• The client provides this SolrServer as preferred server for a query
• If the preferred server is no longer alive the request is retried on another live server
• Everything else follows the existing logic:
  • After live servers are exhausted, any servers previously marked as dead will be tried before failing the request
  • If no live servers are found a SolrServerException is thrown

The implementation is also on github.

Mailing list thread: http://lucene.472066.n3.nabble.com/LBHttpSolrServer-to-query-a-preferred-server-tt3884140.html