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From "Keith Laban (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-10047) Mismatched Docvalue segments cause exception in Sorting/Facting; Uninvert per segment
Date Wed, 05 Apr 2017 19:00:44 GMT

    [ https://issues.apache.org/jira/browse/SOLR-10047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15957449#comment-15957449
] 

Keith Laban commented on SOLR-10047:
------------------------------------

- updated javadoc
- renamed class to {{UninvertingDirectoryReaderPerSegmentMapping}}
- added IndexReader#getReaderCacheHelper (copied note from UninvertingDirectoryReader)
- removed old now unsued UninvertingDirectoryReader


> Mismatched Docvalue segments cause exception in Sorting/Facting; Uninvert per segment
> -------------------------------------------------------------------------------------
>
>                 Key: SOLR-10047
>                 URL: https://issues.apache.org/jira/browse/SOLR-10047
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Keith Laban
>
> The configuration of UninvertingReader in SolrIndexSearch creates a global mapping for
the directory for fields to uninvert. If docvalues are enabled on a field the creation of
a new segment will cause the query to fail when faceting/sorting on the recently docvalue
enabled field. This happens because the UninvertingReader is configured globally across the
entire directory, and a single segment containing DVs for a field will incorrectly indicate
that all segments contain DVs.
> This patch addresses the incorrect behavior by determining the fields to be uninverted
on a per-segment basis.
> With the fix, it is still recommended that a reindexing occur as data loss will when
a DV and non-DV segment are merged, SOLR-10046 addresses this behavior. This fix is to be
a stop gap for the time between enabling docvalues and the duration of a reindex. 



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