[SOLR-1782] stats.facet assumes FieldCache.StringIndex - fails horribly on multivalued fields

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 1.4
• Fix Version/s: 5.0
• Component/s: search

Environment

reproduced on Win2k3 using 1.5.0-dev solr ($Id: CHANGES.txt 906924 2010-02-05 12:43:11Z noble $)

• Assignee: Chris M. Hostetter
• Reporter: Gerald DeConto
• Created: 19/Feb/10 17:02
• Updated: 23/Feb/15 05:00
• Resolved: 03/Feb/15 15:41

Description

the StatsComponent assumes any field specified in the stats.facet param can be faceted using FieldCache.DEFAULT.getStringIndex. This can cause problems with a variety of field types, but in the case of multivalued fields it can either cause erroneous false stats when the number of distinct values is small, or it can cause ArrayIndexOutOfBoundsException when the number of distinct values is greater then the number of documents.
—
New users interested in mixing stats & facets are encouraged to ignore the stats.facet param and instead combine stats.field with facet.pivot to achieve similar results more efficiently...

https://cwiki.apache.org/confluence/display/solr/The+Stats+Component#TheStatsComponent-TheStatsComponentandFaceting

Issue Links

• is duplicated by: SOLR-6487 StatsComponents stats.facet only work for string type field
• is duplicated by: SOLR-3642 Count is inconsistent between facet and stats
• relates to: SOLR-6351 Let Stats Hang off of Pivots (via 'tag')