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From "David Latorre" <dvl...@gmail.com>
Subject Re: [FTPServer] IOException under high load <- FTPSERVER-260
Date Wed, 14 Jan 2009 17:25:28 GMT
2009/1/12 Niklas Gustavsson <niklas@protocol7.com>

> On Mon, Jan 12, 2009 at 6:32 PM, David Latorre <dvlato@gmail.com> wrote:
> > Johh Hearn reported this issue with FTPServer
> > https://issues.apache.org/jira/browse/FTPSERVER-260 where under
> > not-that-high loads connections get closed and an Exception is thrown:
> I've failed to reproduce anything similar on Linux (I don't have a
> Windows box handy). Also, I failed to pretty much use JMeter at all,
> would it be possible to create a JUnit test case for this problem? The
> JMeter code seems to be fairly brutal (not logging out, seems to be
> opening multiple FileOutputStreams for the same local file) so this
> might be specific to JMeter (not that we shouldn't handle that, but it
> would be good to narrow it down a bit).

> Looking at what the net says about the exception
> (http://www.sockets.com/err_lst1.htm look for WSAECONNABORTED), it
> seems to happen when the TCP socket times out due to the client (since
> we get the error in the server) not sending an ACK (if I understand
> the description correctly). Here's further explaining the error:
> http://www.chilkatsoft.com/p/p_299.asp
> Also, what effects to you see on the server when this happens? I'm
> guessing only the session dies, right?

 I also failed to reproduce it on Linux and although it seems specific to
JMeter as you said ( I tried to reproduce it with a simple java.net.URL or
my ftpclient but i wasn't able to), John said it happened to him during
 normal working.  For me, besides the logged exception everything seems to
be working nicely. Maybe John can tell us more about this issue.

> /niklas

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