On Mon, Jun 22, 2009 at 1:14 AM, André Warnier a...@ice-sa.com wrote:
Dmitri O.Kondratiev wrote:
Hello!
I have the following problem:
When using apache load balancer with Tomcat, *sometimes* responses get
truncated , resulting in incomplete HTML of *wrong* encoding. My
application
that Tomcat runs always returns responses in utf-8, yet when truncated,
page
has a different encoding.
The following combinations work:
1) IE - Tomcat
2) IE - Load Balancer - Tomcat
3) WebLoad - Tomcat
The following returns truncated HTML:
1) WebLoad - Load Balancer - Tomcat
Could Apache content negotiation be the reason for this error?
Any other ideas why this could happen?
Hi.
I can't answer, but just to save time for someone else who would like to
help you, could you specify :
- what platforms is (are) this ?
- what versions of Apache and Tomcat ?
- what do you use to connect Apache and Tomcat (mod_proxy_http,
mod_proxy_ajp, mod_jk, other ?)
- is Apache httpd configured to do any kind of caching ?
- what is WebLoad ?
- what do you mean by page has a different encoding ? How do you know
that ? Is the HTTP response Content-type header different ? Is a meta
tag in the page different ?
(If you do not know the answer to that, search in Google for Fiddler2.
That is an add-on for IE, which allows you to see exactly what requests go
from IE - server, and the responses that go server - IE. Including the
HTTP headers, body etc..).
Also, to stop you maybe looking in the wrong place, I believe that Apache
content negociation only happens when you specify it explicitly, and it
should only happen for content that Apache itself can serve locally, not for
anything that is proxied somewhere else.
Also, since according to your data below, it seems to be working fine in
Tomcat itself, and not working fine when Apache httpd is in front of it, you
may want to post this to the Apache httpd users list.
André and Martin, thanks for trying to help!
Before sending to Tomcat list I asked the same question at Apache httpd
users list. No comments so far :(
As a guideline for load balancing I used an approach outlined here:
http://www.theserverside.com/tt/knowledgecenter/knowledgecenter.tss?l=LoadBalancingTomcatApache
Some more context on my problem:
- Everything runs on Win32
- apache-tomcat-6.0.18
- Apache2.2
- mod_proxy_balancer
- WebLoad - is used as load generation tool
http://www.webload.org/
Here is a linkhttp://rapidshare.com/files/247362496/bad-response-data.zip.html
to a zip file with:
- brokren response
- appache tomcat conf
- Packets sniffed by WireShark (with and without balancer)
http://www.wireshark.org/
I will try to provide more data on the problem later.
Thanks!
