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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-4439) IOUtils.copy stops copying when InputStream.read returns 0
Date Wed, 26 Sep 2012 14:03:07 GMT
Adrien Grand created LUCENE-4439:
------------------------------------

             Summary: IOUtils.copy stops copying when InputStream.read returns 0
                 Key: LUCENE-4439
                 URL: https://issues.apache.org/jira/browse/LUCENE-4439
             Project: Lucene - Core
          Issue Type: Bug
    Affects Versions: 4.0
            Reporter: Adrien Grand
            Priority: Minor
             Fix For: 4.1, 5.0


IOUtils.copy has the following lines of code:
{noformat}
      while ((len = fis.read(buffer)) > 0) {
        fos.write(buffer, 0, len);
      }
{noformat}

The problem is that the fact that {{InputStream.read}} returns 0 does not mean that it reached
the end of the stream (there is -1 for this), so this method might not copy the whole file
in rare cases.

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