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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2010/11/20 15:20:13 UTC

[jira] Resolved: (LUCENE-2762) Don't leak deleted open file handles with pooled readers

     [ https://issues.apache.org/jira/browse/LUCENE-2762?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-2762.
----------------------------------------

       Resolution: Fixed
    Fix Version/s: 4.0
                   3.1
                   3.0.3
                   2.9.4

Fixed.

I'll open a new issue to make cfs selection dependent on segment size...

> 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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