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https://issues.apache.org/jira/browse/SOLR-4866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cassandra Targett updated SOLR-4866:
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Component/s: search
> FieldCache insanity when field is used in both faceting and grouping in
> distributed search (distributed grouping uses SortedDocValues)
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-4866
> URL: https://issues.apache.org/jira/browse/SOLR-4866
> Project: Solr
> Issue Type: Bug
> Components: search
> Reporter: Sannier Elodie
> Priority: Minor
>
> Faceting on a fieldX, either single node or distributed, uses the FieldType
> of fieldX to fetch a type based array of field values. Grouping on fieldX
> uses the same type based arrays in single node solr instances -- but when
> using distributed grouping, the multipass grouping logic uses SortedDocValues
> from the FieldCache for fieldX, resulting in "field cache insanity" if you
> also facet on this field, or execute a query against a single shard.
> This descrepency can be observed in the example cnfigs by executing a simple
> grouping query, and then also executing a distributed grouping query...
> http://localhost:8983/solr/select?q=*:*&group=true&group.field=popularity
> http://localhost:8983/solr/select?q=*:*&group=true&group.field=popularity&shards=localhost:8983/solr
> http://localhost:8983/solr/admin/mbeans?stats=true&key=fieldCache
> Background: http://markmail.org/thread/7gctyh6vn3eq5jso
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