Found the issue. We're using WebSphere and the LoadModule directive for the WebSphere plugin had to be loaded before libxml2.so. Still not sure why (probably a messed up library path or something due to the order), but I'm happy with the result.
---------- Forwarded message ---------- I'm attempting to use the mod_proxy_html.so module with IBM IHS (i.e. Apache 2.0.47) on Red Hat ES 3, but am running into difficulties even providing the basics that it needs to run. Specifically, if I attempt to load the file libxml2.so as is expected by the module, HTTPD hangs. I have confirmed that libxml2.so exists and that is is valid (that is, it is the same binary as is installed on our other Red Hat ES 3 servers). I tried both this file and the actual file it's a symbolic link to ( libxml2.so.2.5.10) as options after the LoadFile directive. Here's some of the module/file directives in my httpd.conf: ---- LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_http_module modules/mod_proxy_http.so LoadFile /usr/lib/libxml2.so LoadModule proxy_html_module modules/mod_proxy_html.so LoadModule rewrite_module modules/mod_rewrite.so LoadModule deflate_module modules/mod_deflate.so ---- If I comment out the LoadFile... line, HTTPD states that mod_proxy_html.so has undefined symbols. If I also comment mod_proxy_html.so out, HTTPD loads with no issues. If I comment out mod_proxy_html.so and enable LoadFile /usr/lib/libxml2.so, HTTPD hangs. When enabling libxml2.so, I set the LogLevel to debug and only see the following in the error_log. (Nothing ever prints in the access_log.) [Mon Apr 09 14:30:03 2007] [notice] suEXEC mechanism enabled (wrapper: /opt/IBMIHS/bin/suexec) [Mon Apr 09 14:30:03 2007] [info] mod_unique_id: using ip addr <internal IP address removed> [Mon Apr 09 14:30:04 2007] [info] mod_unique_id: using ip addr <internal IP address removed> Thanks for any and all ideas, comments, further debugging pointers, etc. -- Doug