I was unable to get a custom 404 or other error page to work with ACS 4. I would always get a message in my log file saying "recursion limit exceeded". I set up my config file with something like this:

ns_section "ns/server/${server}/redirects"
  ns_param 404 "/global/notfound.html"

I found a thread from the old ACS bboard, which indicates that there is a bug with caching of ad_conn information somehow. http://www.arsdigita.com/bboard/q-and-a-fetch-msg? msg_id=000c26 And in fact adding the suggested patch to rp_handler does seem to make the error redirect work in my OpenACS4 installation. Has anyone else been able to get custom error pages to work without this hack??

ad_proc -private rp_handler {} {

  The request handler, which responds to absolutely every HTTP 
request made to
  the server.

} {
  ad_call_proc_if_exists ds_collect_connection_info

  if {[string compare [ns_conn url] [ad_conn url]] != 0} {
    rp_debug "ad_conn and ns_conn differ, must be a redirect!"

Hi,

Am seeing the same error messages on my logs as well. The stack size on my control file is already 500000 but I increased it to 800000 but I still see the errors. I noticed though that there are two entires for StackSize.

ns_section ns/parameters
ns_param User nsadmin
ns_param Group nsadmin
ns_param ServerLog ${AOL_HOME}/log/${service_short_name}/server.log
ns_param Home ${AOL_HOME}
ns_param StackSize 800000
ns_param MaxKeepAlive 0

ns_section ns/threads
# use more than 1 processor (Solaris)
ns_param SystemScope on
ns_param StackSize 131072

Regards,