Yes, we do, on Solaris 10. I don't know of any such problems, but I
can't introduce the slow network condition here to test.
Good to know. In case it wasn't clear, the network limiting is done on
the client side, not on the server.
Is the file really truncated, i.e. too short, or is it corrupt? Can
the truncation also be seen in the Tomcat access log? If so, could you
replace the curl/md5sum based test with another HTTP client like
LWP::Simple in perl or "ab" coming with Apache httpd. Just to rule out
the client side of the picture.
Yes the file is definitely truncated rather than corrupted. Users of our
services with normal browsers are noticing the problem, it's what
prompted me to use the Perl+Curl test script.
Is truncation always happening at the same byte? Any pattern?
Which connector are you using? NIO? APR?
I've tried both AJP13 and the standard HTTP1/1 connectors, both have the
same problem. When using AJP the Apache log shows the file size as being
truncated, I'll check the Tomcat log when using HTTP1/1 to see if it agrees.
I personally would try the following to provide additional analysis
data: Find a setup, where you can log the client port. Use this setup
and snoop network traffic during the test on the client and server
side. Once the problem happens, use the local port number and
timestamp to extract the communication pattern on the server and
client side. That way you can see, which side closed/aborted the
connection - or whether it is something in between client and server.
Thanks, I'll give Wireshark or something like that a go to see if I can
see any TCP problems.
--
Andrew Seales
EDINA tel: +44 (0) 131 650 3022
Edinburgh University fax: +44 (0) 131 650 3308
Causewayside House url: http://edina.ac.uk
160 Causewayside email: andrew.sea...@ed.ac.uk
Edinburgh EH9 1PR
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
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