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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1749) FieldCache introspection API
Date Thu, 06 Aug 2009 22:14:14 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740278#action_12740278
] 

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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