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Date: Fri, 25 May 2012 14:10:24 +0000 (UTC)
From: "Mark Miller (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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 <1197491845.17720.1322487520388.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Assigned] (SOLR-2923) IllegalArgumentException when using
 useFilterForSortedQuery on an empty index
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     [ https://issues.apache.org/jira/browse/SOLR-2923?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Miller reassigned SOLR-2923:
---------------------------------

    Assignee: Mark Miller
    
> IllegalArgumentException when using useFilterForSortedQuery on an empty index
> -----------------------------------------------------------------------------
>
>                 Key: SOLR-2923
>                 URL: https://issues.apache.org/jira/browse/SOLR-2923
>             Project: Solr
>          Issue Type: Bug
>          Components: search
>    Affects Versions: 3.6, 4.0
>            Reporter: Adrien Grand
>            Assignee: Mark Miller
>            Priority: Trivial
>         Attachments: SOLR-2923.patch
>
>
> An IllegalArgumentException can occur under the following circumstances:
>  - the index is empty,
>  - {{useFilterForSortedQuery}} is enabled,
>  - {{queryResultsCache}} is disabled.
> Here are what the exception and its stack trace look like (Solr trunk):
> {quote}
> numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count
> 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:917)
> 	at org.apache.solr.search.SolrIndexSearcher.sortDocSet(SolrIndexSearcher.java:1741)
> 	at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1211)
> 	at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:353)
> 	...
> {quote}
> To reproduce this error from a fresh copy of Solr trunk, edit {{example/solr/conf/solrconfig.xml}} to disable {{queryResultCache}} and enable {{useFilterForSortedQuery}}. Then run {{ant run-example}} and issue a query which sorts against any field ({{http://localhost:8983/solr/select?q=*:*&sort=manu+desc}} for example).

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