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https://issues.apache.org/jira/browse/LUCENE-1749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740278#action_12740278
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Mark Miller commented on LUCENE-1749:
-------------------------------------
{quote}(Actually: that seems like a wroth while improvement to make to these
classes: a MultiDocValues impl that all of the getValues(IndexReader) methods
use when passed a MultiReader ... it uses getSequentialSubReaders to construct
DocValue instances for each so you don't get FieldCache expolsions if code
inadvertenly passes the wrong reader to getValues. What do you think? ... new
issue?){quote}
Very interesting idea - def a new issue I think. Not sure its worth it if you
can't protect general fieldcache access as well though ...
> FieldCache introspection API
> ----------------------------
>
> Key: LUCENE-1749
> URL: https://issues.apache.org/jira/browse/LUCENE-1749
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Hoss Man
> Priority: Minor
> Fix For: 2.9
>
> Attachments: fieldcache-introspection.patch,
> LUCENE-1749-hossfork.patch, LUCENE-1749.patch, LUCENE-1749.patch,
> LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch,
> LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch,
> LUCENE-1749.patch
>
>
> FieldCache should expose an Expert level API for runtime introspection of the
> FieldCache to provide info about what is in the FieldCache at any given
> moment. We should also provide utility methods for sanity checking that the
> FieldCache doesn't contain anything "odd"...
> * entries for the same reader/field with different types/parsers
> * entries for the same field/type/parser in a reader and it's subreader(s)
> * etc...
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