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From "Robert Muir (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-3646) throw exception for fieldcache on a non-atomic reader
Date Wed, 14 Dec 2011 00:09:30 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Muir updated LUCENE-3646:
--------------------------------

    Attachment: LUCENE-3646.patch

Attached is an initial patch... all tests pass.
                
> throw exception for fieldcache on a non-atomic reader
> -----------------------------------------------------
>
>                 Key: LUCENE-3646
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3646
>             Project: Lucene - Java
>          Issue Type: Task
>            Reporter: Robert Muir
>             Fix For: 4.0
>
>         Attachments: LUCENE-3646.patch
>
>
> In Lucene 4.0, we go through a lot of effort to prevent slow uses of non-atomic readers:
> DirectoryReader/MultiReader etc throw exception if you don't try to access postings or
docvalues apis per-segment, etc.
> But the biggest trap of all is still too easy to fall into, we don't do the same for
FieldCache.
> I think we should throw exception, forcing the user to either change their code or use
a SlowMultiReaderWrapper.

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