RE: 2.2.14 TCP close problem - race?

From: Tony Gale (gale@syntax.dera.gov.uk)
Date: Wed May 24 2000 - 05:03:56 EST

Sounds like the server doesn't read all the data from the socket
before close'ing it - this results in a RST, and is correct behaviour.

Whats the app?

-tony

On 24-May-2000 Charlie Brady wrote:
>
> A colleague reports the following. Is this a known problem?
> Comments? More
> info required? Fixes?
>
> ====================
>
> We have a problem with some server code and some apparently
> spurious
> RST packets.
>
> The client establishes a session, sends a request and receives
> ECONNRESET
> instead of the data expected. The server side reports no errors. It
> accepts the connection, reads the request and writes the response
> (2
> write calls) and calls close. tcpdump shows everything normal until
> after the ack by the receiver of the server data. This produces the
> RST response. There are no FIN packets.
>
> Workarounds:
> sleep(1) in the server code before the close.
> using 4 byte aligned and sized data packets
> use a solaris 2.6 system for the server end.
>
> My uneducated guess is a race of some sort in the TCP close routine
> where the closed state is being marked prematurely before all data
> is
> sent and acked.
>
> Kernel version is 2.2.14-5.0 (RedHat)
>
> --
> Chris Maltby "One man is as good as another. In fact, probably
> better."
> chris@sw.oz.au
>
>
> -
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---
E-Mail: Tony Gale <gale@syntax.dera.gov.uk>
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