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https://issues.apache.org/jira/browse/LUCENE-548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647170#action_12647170
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Mark Miller commented on LUCENE-548:
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It won't work with ParallelMultiSearcher and I agree that its not really worth
it for MultiSearcher - I've seen more than once...the way to do it is not use
auto. I'd like to get this issue resolved though, so lets resolve it 'won't
fix', or I'll add the 'fix' to MultiSearcher.
> Sort bug using ParallelMultiSearcher
> ------------------------------------
>
> Key: LUCENE-548
> URL: https://issues.apache.org/jira/browse/LUCENE-548
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 1.9
> Environment: Linux FC2 Java 1.4.9
> Reporter: dan
> Priority: Minor
>
> >>>>> Output:
> java.lang.ClassCastException: java.lang.String
> at
> org.apache.lucene.search.FieldDocSortedHitQueue.lessThan(FieldDocSortedHitQueue.java:119)
> at org.apache.lucene.util.PriorityQueue.insert(PriorityQueue.java:61)
> at
> org.apache.lucene.search.MultiSearcherThread.run(ParallelMultiSearcher.java:271)
> >>>>> Input:
> - This only occurs when searching more than one index using
> ParallelMultiSearcher
> - I use the signature new Sort( "date", true)
> - The values in dates are strings in the form 20060419
> - The call to getType in FieldDocSortedHitQueue misinterprets the value as an
> INT, then the exception is thrown
> >>>>> Available workaround
> - I use the the signature new Sort(new SortField( "date", SortField.STRING,
> true)) and the problem goes away.
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