[Sussex] Apache access log HTTP reponse code 103

[Diego Moore]

Hi all,

I've been trying to debug a php application and have come across
something quite strange. We are getting a lot of 103 HTTP responses:

xxx.yyy.xxx.yyy - - [25/Aug/2005:10:51:23 +0100] "GET /testing.php
HTTP/1.1" 103 369924 "https://example.com/testing.php" "Mozilla/5.0
(Windows; U; Windows NT 5.0; en-GB; rv:1.7.8) Gecko/20050511
Firefox/1.0.4"

Which is allways followed by a 200:

xxx.yyy.xxx.yyy - - [25/Aug/2005:10:51:24 +0100] "GET /testing.php
HTTP/1.1" 200 369924 "https://example.com/testing.php" "Mozilla/5.0
(Windows; U; Windows NT 5.0; en-GB; rv:1.7.8) Gecko/20050511
Firefox/1.0.4"

I've never heard of a 103 in my life and cannot find any documentation
on it either. Has anyone else?

TIA
Diego