Index: openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl,v
diff -u -r1.118.2.9 -r1.118.2.10
--- openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl	5 Jan 2016 18:03:48 -0000	1.118.2.9
+++ openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl	2 Feb 2016 16:16:25 -0000	1.118.2.10
@@ -665,6 +665,11 @@
     }
     rp_debug -ns_log_level debug -debug t "rp_filter: setting up request: [ns_conn method] [ns_conn url] [ns_conn query]"
 
+    if {[string length $ad_conn_url] >= 100} {
+        ad_log warning "requested URL is too long ([string length $ad_conn_url] bytes, max 100); url=$ad_conn_url; reset url to /"
+        set ad_conn_url /
+    }
+    
     if { [catch { array set node [site_node::get -url $ad_conn_url] } errmsg] } {
         # log and do nothing
         rp_debug "error within rp_filter [ns_conn method] [ns_conn url] [ns_conn query].  $errmsg"