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From "Josef (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-2762) Don't leak deleted open file handles with pooled readers
Date Wed, 25 May 2011 07:32:47 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038998#comment-13038998
] 

Josef commented on LUCENE-2762:
-------------------------------

Thanks for your response.
I'll try to extract a small test mimicking the behavior.

And thanks for pointing out incRef / decRef and threading issue. I am aware of that and the
relevant code is synchronized


> Don't leak deleted open file handles with pooled readers
> --------------------------------------------------------
>
>                 Key: LUCENE-2762
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2762
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: 2.9.4, 3.0.3, 3.1, 4.0
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 2.9.4, 3.0.3, 3.1, 4.0
>
>         Attachments: LUCENE-2762.patch
>
>
> If you have CFS enabled today, and pooling is enabled (either directly
> or because you've pulled an NRT reader), IndexWriter will hold open
> SegmentReaders against the non-CFS format of each merged segment.
> So even if you close all NRT readers you've pulled from the writer,
> you'll still see file handles open against files that have been
> deleted.
> This count will not grow unbounded, since it's limited by the number
> of segments in the index, but it's still a serious problem since the
> app had turned off CFS in the first place presumably to avoid risk of
> too-many-open-files.  It's also bad because it ties up disk space
> since these files would otherwise be deleted.

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