[LON-CAPA-admin] Not Open To Be Viewed Troubles

Lucas, Mark lucasm at ohio.edu
Tue Oct 3 18:00:55 EDT 2017


I don’t know of a log specifically, but I do know that parameters get cached for
up to 10 minutes on a server. My limited understanding is that if a parameter
was looked up and cached, but then was immediately changed, it could take up 
to 600s before it was looked up again by the access server. Please someone correct
me if I’m wrong here.

When I was having issues with our balancer, Stuart suggested I use:
/home/httpd/perl/debug/memcached_dump.pl -u 

to get a look at the cached information on a server.

> On Oct 3, 2017, at 4:24 PM, Bynum, Lee Hamilton <leebynum at illinois.edu> wrote:
> Hello Admins,
> I am diving back into an issue we’ve had in which resources are temporarily “Not open to be viewed.”  The resources should be available now and do become available after 10-20 minutes or a change of access server.  The leading theory is that the parameter file is being read incorrectly, resulting in the access server thinking the resource is unavailable until the bad parameter is updated.
> Is there a log anywhere of access server parameter file changes?  Because things seem to go back to normal after a while I have yet to have the problem reported to me in time to look at the potentially problematic files in real time.
> Sorry for rehashing old troubles, but I’m hoping this time will to the trick.
> Lee
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Mark Lucas 								email: lucasm at ohiou.edu
252D Clippinger Lab						phone: (740)597-2984
Department of Physics and Astronomy			fax: (740)593-0433
Ohio University
Athens, OH 45701

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