Adrien Grand created LUCENE-4439:
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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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