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https://issues.apache.org/jira/browse/SOLR-1782?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man updated SOLR-1782:
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Attachment: SOLR-1782.test.patch
patch containing two new test methods that demonstrate this bug -- one creates
an index with a single document (and two values) to trigger the AIOOBE, the
second adds many docs with a small number of distinct values, and demonstrates
the incorrect stats facet values.
Off the top of my head i don't know a simple way to fix this ... if no one else
has any better suggestions, we should consider adding Schema based error
checking to fail fast if the user attempts to facet on fields which are not
single valued string fields -- some other field types *might* work, but i'd
rather fail more often then we have to then return bogus statistics.
> stats.facet assumes FieldCache.StringIndex - fails horribly on multivalued
> fields
> ---------------------------------------------------------------------------------
>
> Key: SOLR-1782
> URL: https://issues.apache.org/jira/browse/SOLR-1782
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 1.4
> Environment: reproduced on Win2k3 using 1.5.0-dev solr ($Id:
> CHANGES.txt 906924 2010-02-05 12:43:11Z noble $)
> Reporter: Gerald DeConto
> Attachments: index.rar, SOLR-1782.test.patch
>
>
> the StatsComponent assumes any field specified in the stats.facet param can
> be faceted using FieldCache.DEFAULT.getStringIndex. This can cause problems
> with a variety of field types, but in the case of multivalued fields it can
> either cause erroneous false stats when the number of distinct values is
> small, or it can cause ArrayIndexOutOfBoundsException when the number of
> distinct values is greater then the number of documents.
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