[SOLR-1143] Return partial results when a connection to a shard is refused

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: search
• Assignee: Unassigned Assign to me
• Reporter: Nicolas Dessaigne
• Created: 04/May/09 10:05
• Updated: 08/Mar/12 05:40
• Resolved: 24/Feb/12 21:53

Description

If any shard is down in a distributed search, a ConnectException it thrown.

Here's a little patch that change this behaviour: if we can't connect to a shard (ConnectException), we get partial results from the active shards. As for TimeOut parameter (https://issues.apache.org/jira/browse/SOLR-502), we set the parameter "partialResults" at true.

This patch also adresses a problem expressed in the mailing list about a year ago (http://www.nabble.com/partialResults,-distributed-search---SOLR-502-td19002610.html)

We have a use case that needs this behaviour and we would like to know your thougths about such a behaviour? Should it be the default behaviour for distributed search?

Issue Links

• is duplicated by: SOLR-2253 Solr should be able to keep on truckin' if a shard fails during a distributed search
• relates to: SOLR-1537 Dedupe Sharded Search Results by Shard Order or Score
• relates to: SOLR-3134 Include shard Information in response