IllegalArgumentException when using useFilterForSortedQuery on an empty index
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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
Priority: Trivial
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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