The Grouping feature only works if groups are in the same shard. Perhaps that is the problem here?
I could find https://issues.apache.org/jira/browse/SOLR-4164 which says that once the sharding was fixed, the problem went away. We should come up with a better exception message though. On Fri, Mar 21, 2014 at 10:49 PM, Ugo Matrangolo <ugo.matrang...@gmail.com> wrote: > Hi, > > I have a two shard collection running and I'm getting this error on each > query: > > 2014-03-21 17:08:42,018 [qtp-75] ERROR > org.apache.solr.servlet.SolrDispatchFilter - > *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:1130) > at > org.apache.lucene.search.TopFieldCollector.create(TopFieldCollector.java:1079) > 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:129) > at > org.apache.solr.search.grouping.CommandHandler.execute(CommandHandler.java:142) > at > org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:387) > at > org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:214) > at > org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) > at org.apache.solr.core.SolrCore.execute(SolrCore.java:1916) > at > org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:780) > > Note that I'm using grouping and disabling it fixed the problem. > > I was aware that SolrCloud does not fully supports grouping in a > distributed setup but I was expecting incorrect results (that have to > addressed with custom hashing afaik) and not an error. > > Does anyone see this error before? > > Ugo -- Regards, Shalin Shekhar Mangar.
