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From "Michael McCandless (Commented) (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3646) throw exception for fieldcache on a non-atomic reader
Date Wed, 14 Dec 2011 17:17:30 GMT


Michael McCandless commented on LUCENE-3646:

+1, looks great.  Nice how few places required SlowMR wrapping....
> throw exception for fieldcache on a non-atomic reader
> -----------------------------------------------------
>                 Key: LUCENE-3646
>                 URL:
>             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
> I think we should throw exception, forcing the user to either change their code or use
a SlowMultiReaderWrapper.

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