> [net] retrieveFileStream fails randomly
> Key: NET-46
> URL: https://issues.apache.org/jira/browse/NET-46 > Project: Commons Net
> Issue Type: Bug
> Components: FTP
> Affects Versions: 1.4
> Environment: Operating System: Windows XP
> Platform: PC
> Reporter: Dennis Meerveld
> For my application I need a way to get the InputStream of a binary file on a
> FTPServer. What I did was :
> // connect and get ftpFiles as an array
> // for each ftpFile ...
> InputStream is = ftp.retrieveFileStream(ftpFiles[i].getName());
> However, this behaves erratically : sometimes the inputstream is correct and
> sometimes it is null (and the ftpFile exists, no weird name or anything odd
> about it).
> After first blaming my FTPServer (I use GuildFTPd 0.9.9.13) I tried another
> FTPServer (Serv-U 6.1), but this also had the same behavior.
> Then I thought I might have to do with timing. So I tried Thread.sleep(xxx) on a
> couple of locations but to no avail. In a last attempt (was getting pretty
> desperate :) ) I rewrote my original line and replaced it by this :
> ByteArrayOutputStream out = new ByteArrayOutputStream();
> InputStream is = new ByteArrayInputStream(out.toByteArray());
> And much to my surprise, it worked like a charm. Tested it a couple of times (on
> both FTPServer products) and works perfectly.
> So I'm guessing something is going wrong in your retrieveFileStream
> implementation. Maybe something worth looking into ? (easiest fix : use the
> ByteArrayOut/InputStream swap :)).
> kind regards,
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