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https://issues.apache.org/jira/browse/SOLR-2716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neil Prosser updated SOLR-2716:
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Attachment: SOLR-2716.patch
> QueryResultKey hashCode() and equals() is dependent on filter order
> -------------------------------------------------------------------
>
> Key: SOLR-2716
> URL: https://issues.apache.org/jira/browse/SOLR-2716
> Project: Solr
> Issue Type: Improvement
> Components: search
> Affects Versions: 3.3
> Reporter: Neil Prosser
> Priority: Minor
> Attachments: SOLR-2716.patch
>
>
> The hashCode() and equals() methods of a QueryResultKey are dependent on the
> order of the filters meaning that potentially identical result sets are
> missed when cached.
> Query query = new TermQuery(new Term("field1", "value1"));
> Query filter1 = new TermQuery(new Term("field2", "value2"));
> Query filter2 = new TermQuery(new Term("field3", "value3"));
> List<Query> filters1 = new ArrayList<Query>();
> filters1.add(filter1);
> filters1.add(filter2);
> List<Query> filters2 = new ArrayList<Query>();
> filters2.add(filter2);
> filters2.add(filter1);
> QueryResultKey key1 = new QueryResultKey(query, filters1, null, 0);
> QueryResultKey key2 = new QueryResultKey(query, filters2, null, 0);
> // Both the following assertions fail
> assert key1.equals(key2);
> assert key1.hashCode() == key2.hashCode();
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