[SOLR-2863] Solr 3.4 group.truncate does not work with facet queries

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Later
• Affects Version/s: 3.4
• Component/s: search
• Labels: facet grouping query search truncate

Environment

Solr 3.4 on Windows Server 2008.

• Assignee: Unassigned
• Reporter: Ian Grainger
• Created: 28/Oct/11 11:55
• Updated: 29/Oct/11 10:27
• Resolved: 29/Oct/11 10:27

Description

When using Grouping with group.truncate=true, The following simple facet query:
facet.query=Monitor_id:[380000 TO 400000]

Doesn't give the same number as the nGroups result for the equivalent filter query:
fq=Monitor_id:[380000 TO 400000]

From the Wiki page: 'group.truncate: If true, facet counts are based on the most relevant document of each group matching the query.'

If I turn off group.truncate then the counts are the same, as I'd expect - but unfortunately I'm only interested in the grouped results.

Asked this question on the Solr-user mailing list and was told it is likely a bug by: Martijn Groningen.

I'd be very interested in any workaround for this bug!