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https://issues.apache.org/jira/browse/LUCENE-2108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12785978#action_12785978
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Michael McCandless commented on LUCENE-2108:
--------------------------------------------
Some feedback on the patch:
* If you back-port this to 2.9, you can't use any of the
java.util.concurrent.*
* I'm not sure you need a separate SearcherHolder class -- can't you
re-use IndexReader's decRef/incRef?
* You don't need to do this.XXX in most places (maybe you're coming
from eg Python? ;) ).
* Maybe rename "releaseNewSearcher" -> "swapSearcher"? (Because it
releases the old one and installs the new one).
* I think there are some thread safety issues -- eg
getSearcherHolder isn't sync'd, so, when you incRef
this.searcherHolder at the start, but then return
this.searcherHolder at the end, it could be two different
instances.
> SpellChecker file descriptor leak - no way to close the IndexSearcher used by
> SpellChecker internally
> -----------------------------------------------------------------------------------------------------
>
> Key: LUCENE-2108
> URL: https://issues.apache.org/jira/browse/LUCENE-2108
> Project: Lucene - Java
> Issue Type: Bug
> Components: contrib/spellchecker
> Affects Versions: 3.0
> Reporter: Eirik Bjorsnos
> Assignee: Simon Willnauer
> Fix For: 3.0.1, 3.1
>
> Attachments: LUCENE-2108-SpellChecker-close.patch, LUCENE-2108.patch,
> LUCENE-2108.patch
>
>
> I can't find any way to close the IndexSearcher (and IndexReader) that
> is being used by SpellChecker internally.
> I've worked around this issue by keeping a single SpellChecker open
> for each index, but I'd really like to be able to close it and
> reopen it on demand without leaking file descriptors.
> Could we add a close() method to SpellChecker that will close the
> IndexSearcher and null the reference to it? And perhaps add some code
> that reopens the searcher if the reference to it is null? Or would
> that break thread safety of SpellChecker?
> The attached patch adds a close method but leaves it to the user to
> call setSpellIndex to reopen the searcher if desired.
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