I was recently told my web site wasn't working.  Upon investigation it
turns out only one page doesn't work, but it's the site's main entry
page.  If you go to <http://MAP-NE.com/> you get the error message in
the subject.  Apparently, all other pages work fine.  When this page
is retrieved, the following is sent to the debug log

          : Internal server error: <Invalid backtrace/error container: 
RoxenModule(MAP-NE/rxmltags#0)->__class_66630_0_line_3068()>
          : pike/lib/master.pike (311ee057):4641: 
master()->describe_backtrace(RoxenModule(MAP-NE/rxmltags#0)->__class_66630_0_line_3068(),999999)
          : base_server/roxenloader.pike (rev 1.475):222: 
describe_backtrace(@0=RoxenModule(MAP-NE/rxmltags#0)->__class_66630_0_line_3068(),UNDEFINED)
          : protocols/http.pike (rev 1.643):1779: 
RequestID(/)->internal_error(0)
 0:54:12  : protocols/http.pike (rev 1.643):3072: RequestID(/)->handle_request()
54d 0h51m : protocols/http.pike (rev 1.643):3002: 
RequestID(/)->handle_request_from_queue()
          : base_server/roxen.pike (rev 1.1113):906: roxen()->handler_thread(12)
          : 
          : 
          : 
 1:00:00  : ** 2013-07-22 01:00   pid: 2650   ppid: 2624   uid: root
54d 0h56m : 

But, I can't figure out from that what exactly is wrong.  This also
happens on my development version (which at this point is identical).
I don't see anything special about this page, other index.html pages
come out fine (see for example <http://MAP-NE.com/ne/> from which you
can try all the navigation), and if I move it aside I get the expected
directory listing.

The last edit to this file was a simple change to some text.  This
implies to me that at the time of this edit (last September) I had
been looking at the page in a web browser to be inspired to make the
change, so it worked then (and I would have been very surprised if it
had taken that long to notice).

>From looking at the debug logs, this error seems to have started
happening on April 1 (an interesting date), but not clear why.  That's
long enough ago that I can't remember if anything interesting happened
then.  But, I can imagine nobody commenting it for that long (and the
monitoring procedure I have only checks that it gets _something_ and
apparently this error page passes the test, time to improve that, as
well :-).

So, if someone can determine from that output what's wrong, or make
some useful suggestions on where to go next in debugging the problem,
I could really use the help.  I'm quitting for the night having spent
several hours tracking it this far.  I expect to get back to it
tomorrow (if it's been broken over 3 months, another day will hardly
count).  Because of time-zone differences, hopefully I'll have
recieved some useful suggestions by then...

           ___
  /|  /|  /|  \    Michael A. Patton, President       [email protected]
 / | / | /_|__/    MAP Network Engineering         http://MAP-NE.com
/  |/  |/  |       Network Infrastructure design: Routing, DNS, more

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