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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2014/03/20 23:27:54 UTC

[jira] [Created] (LUCENE-5543) Remove Directory.fileExists

Michael McCandless created LUCENE-5543:
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             Summary: Remove Directory.fileExists
                 Key: LUCENE-5543
                 URL: https://issues.apache.org/jira/browse/LUCENE-5543
             Project: Lucene - Core
          Issue Type: Improvement
          Components: core/store
            Reporter: Michael McCandless
            Assignee: Michael McCandless
             Fix For: 4.8, 5.0


Since 3.0.x/3.6.x (see LUCENE-5541), Lucene has substantially removed
its reliance on fileExists to the point where I think we can fully
remove it now.

Like the other iffy IO methods we've removed over time (touchFile,
fileModified, seeking back during write, ...), File.exists is
dangerous because a low level IO issue can cause it to return false
when it should have returned true.  The fewer IO operations we rely on
the more reliable/portable Lucene is.




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