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From "Robert Muir (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-3646) throw exception for fieldcache on a non-atomic reader
Date Wed, 14 Dec 2011 00:09:29 GMT
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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