[LON-CAPA-admin] Problems during Course Initialization occur after cloning a course

[Stuart Raeburn]

Martin,

> Doing a test by cloning the original course again results in getting
> the same error. No other courses seem to be affected.

> Invalid map: /home/httpd/html/adm/notfound.html

This error means that the initial replication of the default.sequence  
file (the XML file of course contents at the top level folder in the  
course) failed, resulting in a top-level course URL of  
/adm/notfound.html.

I would however expect that cloning etc. would have proceeded despite this.

The most likely reason for the replication failure is that your Apache  
default-ssl.conf file does not include an entry for the correct Server  
Certificate Chain.

Look for: SSLCertificateChainFile in that file.

The version of libwww-perl used by Ubuntu 12.04 will not, by default,  
retrieve a file from an https:// URL unless the certificate chain can  
be used to verify the hostname.

If it cannot, LWP will return a 500 error, and the URL for the course  
will be set to /adm/notfound.html

Look in /home/httpd/perl/logs/lonnet.log for:

<font color="blue">WARNING: LWP get: 500
Can't connect to <hostname>:443 (certificate verify failed):

You could also check in /var/log/apache2/ssl_access_log for entries  
similar to:

"GET /userfiles/tuc/<courseid>/default.sequence HTTP/1.1"

where <courseid> is the internal courseID of the course you created in
the tuc domain.

However, if certificate verification did indeed fail, LWP will not  
have made the request, so you'll not find a "GET" for that URL logged  
in ssl_access_log.

 From the command line you might check whether the certificate chain  
is valid by using:

wget https://loncapa.tu-clausthal.de/userfiles/tuc/<courseid>/default.sequence

replacing <courseid> with the internal courseID of the course.


Stuart Raeburn
LON-CAPA Academic Consortium

Quoting Martin Diedrich <diedrich at rz.tu-clausthal.de>:

> Hello to all,
>
> I have a problem occurring after cloning a course: Logging in as the
> course coordinator of a cloned course i get the error "Problems during
> Course Initialization", "The following problems occurred: Invalid map:
> /home/httpd/html/adm/notfound.html". Same thing occurs when I log in as
> domain coordinator and select "enter the course as course coordinator"
> after searching for it. The course has no content, the original one has
> (accessible, no errors).
>
> The original course was implemented in LC 2.10.x - I updated the system
> and it's now running LC 2.11.0 (VERSION: 2.11.0-2014063012) on Ubuntu
> 12.04 LTS. After that update I cloned the course.
>
> Doing a test by cloning the original course again results in getting
> the same error. No other courses seem to be affected.
>
> Where should I search for any reason or how do I fix that? Every
> suggestion is more than welcome :)!
>
> By the way: Many thanks for the very fast response to my last question
> some weeks ago.
>
> Greetings
> Martin Diedrich
> -- 
> Dipl.-Wirt.-Inf. Martin Diedrich   E-Mail: diedrich at rz.tu-clausthal.de
> Rechenzentrum TU Clausthal         Telefon: +49 5323 72 2522
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