[SOLR-2923] IllegalArgumentException when using useFilterForSortedQuery on an empty index

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 3.6, 4.0-ALPHA
• Fix Version/s: 4.0-ALPHA
• Component/s: search
• Assignee: Mark Miller
• Reporter: Adrien Grand
• Created: 28/Nov/11 13:38
• Updated: 10/May/13 10:40
• Resolved: 25/May/12 15:55

Description

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):

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)
...

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).