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https://issues.apache.org/jira/browse/LUCENE-3439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-3439:
---------------------------------------

    Attachment: LUCENE-3439.patch

Patch, adding missing ensureOpens, adding volatile to IW's close/closing bools, 
and fixing the scary bug where we invoke del policy (and possibly delete file) 
on a closed writer.

> add checks/asserts if you search across a closed reader
> -------------------------------------------------------
>
>                 Key: LUCENE-3439
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3439
>             Project: Lucene - Java
>          Issue Type: Bug
>            Reporter: Robert Muir
>         Attachments: LUCENE-3439.patch, LUCENE-3439_test.patch
>
>
> if you try to search across a closed reader (and/or searcher too),
> there are no checks, not even assertions statements.
> this results in crazy scary stacktraces deep inside places like FSTs/various 
> term dictionary implementations etc.
> In some situations, depending on codec, you wont even get an error (i'm sure 
> its fun when you try to retrieve the stored fields!)

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