[SOLR-2380] Problem when using facet.offset with facet.sort=lex and shards

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.1, 3.1, 4.0-ALPHA
• Fix Version/s: 3.1
• Component/s: search
• Assignee: Yonik Seeley
• Reporter: Peter Cline
• Created: 24/Feb/11 22:12
• Updated: 30/Mar/11 15:45
• Resolved: 24/Feb/11 22:35

Description

I'm having a problem using distributed search in conjunction with the facet.offset parameter and lexical facet value sorting.

I have a facet with ~100k values in one index. I'm wanting to page through them alphabetically. When not using distributed search, everything works just fine, and very quick. A query like this works, returning 10 facet values starting at the 50,001st:

http://server:port/solr/select/?q=*:*&facet.field=subject_full_facet&facet=true&f.subject_full_facet.facet.limit=10&facet.sort=lex&facet.offset=50000
# Butterflies - Indiana !

However, if I enable distributed search, using a single shard (which is the same index), I get no facet values returned.

http://server:port/solr/select/?q=*:*&facet.field=subject_full_facet&facet=true&f.subject_full_facet.facet.limit=10&facet.sort=lex&facet.offset=50000&shards=server:port/solr
# empty list :(

Doing a little more testing, I'm finding that with sharding I often get an empty list any time the facet.offset >= facet.limit. Also, by example, if I do facet.limit=100 and facet.offset=90, I get 10 facet values. Doing so without sharding, I get the expected 100 values (starting at what would normally be the 91st).

Thanks,

Peter