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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (LUCENE-948) Writers on two machines over NFS can hit FNFE due to stale NFS client caching
Date Fri, 03 Aug 2007 18:49:53 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless resolved LUCENE-948.
---------------------------------------

    Resolution: Fixed

Fixed on trunk (2.3).

> Writers on two machines over NFS can hit FNFE due to stale NFS client caching
> -----------------------------------------------------------------------------
>
>                 Key: LUCENE-948
>                 URL: https://issues.apache.org/jira/browse/LUCENE-948
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Index
>    Affects Versions: 2.1
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 2.3
>
>         Attachments: LUCENE-948-core-2.2.0.jar, LUCENE-948-core-2.2.0.take2.jar, LUCENE-948.patch,
LUCENE-948.take2.patch
>
>
> Issue spawned from this thread:
>   http://www.gossamer-threads.com/lists/lucene/java-user/50680
> When IndexFileDeleter lists the directory, looking for segments_X
> files to load, if it hits a FNFE on opening such a file it should
> catch this and treat it as if the file does not exist.
> On NFS (and possibly other file systems), a directory listing is not
> guaranteed to be "current"/coherent.  Specifically, if machine #1 has
> just removed file "segments_n" and shortly thereafer machine #2 does a
> dir listing, it's possible (likely?) that the dir listing will still
> show that segments_n exists.
> I think the fix is simple: catch the FNFE and just handle it as if the
> segments_n does not in fact exist.

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