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From "Shay Banon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2468) reopen on NRT reader should share readers w/ unchanged segments
Date Tue, 18 May 2010 14:31:43 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12868659#action_12868659
] 

Shay Banon commented on LUCENE-2468:
------------------------------------

I think that the solution suggested, to use the FieldCacheKey is not good enough, sadly. I
am attaching a simpel test that shows that this does not work for cases when a query is passed
to a searcher, without a filter, but that query, is, for example, a ConstantScoreQuery. I
have simply taken the CachingWrapperFiler and changed it to use the getFieldCacheKey instead
of using the IndexReader.

This is problematic, since a filter can be used somewhere in the query tree, and wrapped for
caching. I am running against 3.0.1.

> reopen on NRT reader should share readers w/ unchanged segments
> ---------------------------------------------------------------
>
>                 Key: LUCENE-2468
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2468
>             Project: Lucene - Java
>          Issue Type: Bug
>            Reporter: Yonik Seeley
>            Assignee: Michael McCandless
>         Attachments: LUCENE-2468.patch
>
>
> A repoen on an NRT reader doesn't seem to share readers for those segments that are unchanged.
> http://search.lucidimagination.com/search/document/9f0335d480d2e637/nrt_and_caching_based_on_indexreader

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