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https://issues.apache.org/jira/browse/SOLR-5046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13713111#comment-13713111
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Yonik Seeley commented on SOLR-5046:
------------------------------------
Looks like there are other errors in this area... when trying to reproduce in
unit tests, I got
{quote}
20948 T16 C0 oasc.SolrException.log ERROR java.lang.IllegalArgumentException:
numHits must be > 0; please use TotalHitCountCollector if you just need the
total hit count
at
org.apache.lucene.search.TopScoreDocCollector.create(TopScoreDocCollector.java:254)
at
org.apache.lucene.search.TopScoreDocCollector.create(TopScoreDocCollector.java:238)
at
org.apache.solr.search.Grouping$CommandQuery.newCollector(Grouping.java:853)
at
org.apache.solr.search.Grouping$CommandQuery.createFirstPassCollector(Grouping.java:845)
at org.apache.solr.search.Grouping.execute(Grouping.java:316)
at
org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:408)
{quote}
> IllegalArgumentException using distributed group.query when one shard does
> not match any docs
> ---------------------------------------------------------------------------------------------
>
> Key: SOLR-5046
> URL: https://issues.apache.org/jira/browse/SOLR-5046
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.3
> Reporter: Hoss Man
>
> [Evgeny Salnikov noted this problem on the mailing
> list|http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201307.mbox/%3CCADz7Cx6PbMxExhb8gsCu9%3DP6nphJd2fYayov_%3D%3D%2Bo1sEXswWLw%40mail.gmail.com%3E],
> although the initial report was somewhat convoluted by suspicious
> description of adding shards after the fact.
> Steps to reproduce using 4.3.1 example...
> * startup a 2 node SolrCloud cluster following the "Example A" description on
> the SolrCloud wiki...
> ** cp example example2
> ** cd example && java -Dbootstrap_confdir=./solr/collection1/conf
> -Dcollection.configName=myconf -DzkRun -DnumShards=2 -jar start.jar
> ** cd example2 && java -Djetty.port=7574 -DzkHost=localhost:9983 -jar
> start.jar
> * index exactly one doc (to ensure that subsequent distributed queries get
> results from only one node)
> ** java -jar post.jar utf8-example.xml
> * execute a request using group.query
> ** http://localhost:7574/solr/select?q=*:*&group=true&group.query=cat:software
> stack trace...
> {noformat}
> 166500 [qtp2092063645-19] ERROR org.apache.solr.servlet.SolrDispatchFilter –
> null:java.lang.IllegalArgumentException: shard 1 did not set sort field
> values (FieldDoc.fields is null); you must pass fillFields=true to
> IndexSearcher.search on each shard
> at
> org.apache.lucene.search.TopDocs$MergeSortQueue.<init>(TopDocs.java:143)
> at org.apache.lucene.search.TopDocs.merge(TopDocs.java:214)
> at
> org.apache.solr.search.grouping.distributed.responseprocessor.TopGroupsShardResponseProcessor.process(TopGroupsShardResponseProcessor.java:114)
> at
> org.apache.solr.handler.component.QueryComponent.handleGroupedResponses(QueryComponent.java:619)
> at
> org.apache.solr.handler.component.QueryComponent.handleResponses(QueryComponent.java:602)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:311)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:1816)
> {noformat}
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