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https://issues.apache.org/jira/browse/SOLR-4164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15544135#comment-15544135
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Yonik Seeley commented on SOLR-4164:
------------------------------------
bq. In this case group.limit kinda more like rows parameter in /select and we
don't support for negative rows param now.
group.limit=-1 does work (and has always worked) in non-distrib mode though (by
design). IIRC "rows" not supporting -1 was an oversight that I never got
around to fixing. A number of people have been surprised that this doesn't
just work.
If group.limit=-1 is difficult to support in distributed mode for some reason
(I don't know that part of the code), then I guess we'll have to live with
different behavior in non-distrib vs distrib for now.
> Result Grouping fails if no hits
> --------------------------------
>
> Key: SOLR-4164
> URL: https://issues.apache.org/jira/browse/SOLR-4164
> Project: Solr
> Issue Type: Bug
> Components: SearchComponents - other, SolrCloud
> Affects Versions: 4.0
> Reporter: Lance Norskog
> Assignee: Cao Manh Dat
>
> In SolrCloud, found a result grouping bug in the 4.0 release.
> A distributed result grouping request under SolrCloud got this result:
> {noformat}
> 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)
> {noformat}
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