[SOLR-4164] Result Grouping fails if no hits

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0
• Fix Version/s: 6.3, 7.0
• Component/s: SearchComponents - other, SolrCloud
• Assignee: Yonik Seeley
• Reporter: Lance Norskog
• Created: 11/Dec/12 03:55
• Updated: 09/Nov/16 08:38
• Resolved: 26/Oct/16 16:59

Description

In SolrCloud, found a result grouping bug in the 4.0 release.
A distributed result grouping request under SolrCloud got this result:

Dec 10, 2012 10:32:07 PM org.apache.solr.common.SolrException log
SEVERE: null:java.lang.IllegalArgumentException: numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count
        at org.apache.lucene.search.TopFieldCollector.create(TopFieldCollector.java:1120)
        at org.apache.lucene.search.TopFieldCollector.create(TopFieldCollector.java:1069)
        at org.apache.lucene.search.grouping.AbstractSecondPassGroupingCollector.<init>(AbstractSecondPassGroupingCollector.java:75)
        at org.apache.lucene.search.grouping.term.TermSecondPassGroupingCollector.<init>(TermSecondPassGroupingCollector.java:49)
        at org.apache.solr.search.grouping.distributed.command.TopGroupsFieldCommand.create(TopGroupsFieldCommand.java:128)
        at org.apache.solr.search.grouping.CommandHandler.execute(CommandHandler.java:132)
        at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:339)
        at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:206)