Topic: Reverse proxy restarting Apache

[Dyslexicbloke]

Hi folks,
I am very new to Apache ... feel free to tell me if I am being silly anywhere.

OS Windows server 2003 (Fully updated)
C++ Runtimes installed as described in 2.2.16 download from this site.
2.2.16 installed as directed here (Actually overritten 2.2.15 - from installer)
The problem I am about to describe hasnt been affected by the upgrade.
PHP and PostgreSql installed but I dont think relavent here

I have used information found here to set up a reverse proxy, several in fact.
[The ones shown ar internet resources for testing purposes. I will be pointing at HMI's or PLC's with html interfaces.]

I have several problems but the most significant is that the server restarts when the proxy is active and mod_xml2enc.so is loaded.
This results in a blank or partally loaded page in the browser ... it also takes a long time.

[ On sites that do work there are formating issues but I expect these will be corectable with rule sets]

With the following config lines the proxy works for 'some sites' but warns xml2enc should be loaded to support none ascii coding.

LoadModule proxy_module modules/mod_proxy.so
# LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
# LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
# LoadModule proxy_connect_module modules/mod_proxy_connect.so
# LoadModule proxy_ftp_module modules/mod_proxy_ftp.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule headers_module modules/mod_headers.so
LoadFile bin/zlib1.dll
LoadFile bin/iconv/iconv.dll
LoadFile bin/libxml2.dll
LoadModule proxy_html_module modules/mod_proxy_html.so
# LoadModule xml2enc_module modules/mod_proxy_html/mod_xml2enc.so
#
ProxyPass /hmi2/ http://www.cogentautomation.co.uk/
ProxyHTMLURLMap http://www.cogentautomation.co.uk/ /hmi2/
<Location /hmi2/>
ProxyPassReverse /
ProxyHTMLURLMap / /hmi2/
</Location>
#
ProxyPass /hmi3 http://www.apachelounge.com
ProxyHTMLURLMap http://www.apachelounge.com /hmi3
<Location /hmi3>
ProxyPassReverse /
ProxyHTMLURLMap / /hmi3
</Location>
#
ProxyPass /hmi4/ http://apache.webthing.com/
ProxyHTMLURLMap http://apache.webthing.com/ /hmi4/
<Location /hmi4/>
ProxyPassReverse /
ProxyHTMLURLMap / /hmi4/
</Location>
#
Locations hmi2 and hmi4 (work with formating errors).
Location hmi3 fails to load and complains about an unsuported charset.(Log Below)
[debug] mod_proxy_http.c(1736): proxy: start body send
[warn] [client 192.168.52.1] No i18n support found. Install mod_xml2enc if required
[debug] mod_proxy_http.c(1840): proxy: end body send

With the mod_xml2enc.so line place ..
with hmi2 and hmi4 I get 1 or more of the following errors and content may eventually load.
[debug] mod_proxy_http.c(1844): proxy: header only.
[notice] Parent: child process exited with status 3221225477 -- Restarting.

hmi3 still fails to load content but does NOT produce the restart and presents a diferent error this time from mod_xml2enc (Log Below)
[Thu Aug 05 08:32:13 2010] [debug] mod_proxy_http.c(1736): proxy: start body send
[Thu Aug 05 08:32:13 2010] [debug] mod_xml2enc.c(201): [client 192.168.52.1] Content-Type is text/html
[Thu Aug 05 08:32:13 2010] [debug] mod_xml2enc.c(270): [client 192.168.52.1] Charset ISO-8859-1 not supported by libxml2; trying apr_xlate
[Thu Aug 05 08:32:13 2010] [error] [client 192.168.52.1] Charset ISO-8859-1 not supported. Consider aliasing it?

I dont know what is but will check ...
I have read all I can find on the subject of reverse proxies under windows and tried many diferent configs.
I am now out of idears .... PLEASE can anyone help.

Thanks for reading
Al

[James Blond]

mod_xml2enc works only with UTF-8, but you try to use ISO-8859-1. See http://apache.webthing.com/mod_xml2enc/ how to use UTF-8 (xml2EncAlias)

[apforrest]

Hi.

I've been confronted with a similar issue to the one mentioned above.

Was a solution found?

Andy