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https://issues.apache.org/jira/browse/SOLR-5046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14190292#comment-14190292
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Timo Schmidt edited comment on SOLR-5046 at 10/30/14 4:11 PM:
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The attached patch shows that grouping in distributed mode is working with
"sort" and without sort (by score).
It think this could also be handled inside TopDocs.merge by checking if there
is a sorting that "needsScores"
Also strange for me, it is not working for grouping.sort=... It seems that the
argument "sort" somewhere fills the lucene fields and "group.sort" not.
was (Author: timo.schmidt):
The attached patch shows that grouping in distributed mode is working with
"sort" and without sort (by score).
> 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
> Attachments:
> 0001-Get-distributed-grouping-request-work-with-sort-with.patch
>
>
> [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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