[LON-CAPA-admin] Can't access user status pages

Bob Gonzales rgonzal at binghamton.edu
Mon Feb 22 15:14:50 EST 2016 

Stuart,

There was a typo in /home/httpd/lonTabs/domain.tab that I missed.  Things
look proper again, and I can access the user status pages.

One other note, all of my /home/httpd/lonTabs look like this:

# domain:Domain Name:auth mechanism:auth
parameters:Language:City:Geo1:Geo2:main library
binghamton:Binghamton University:::::::binghamtonl1

there isn't a 'en-US' in one of the fields.  How does that get filled in?

Once again, thank you for the help.

Bob

On Mon, Feb 22, 2016 at 2:09 PM, Stuart Raeburn <raeburn at msu.edu> wrote:

> Bob,
>
>
>> I still get cannot access the user status pages on
>> loncapa6.chem.binghamton.edu while I can access all of the others.
>>
>>
> Comparing http://loncapa6.chem.binghamton.edu/adm/login with
> http://loncapa5.chem.binghamton.edu/adm/login it is evident that loncapa6
> is unable to retrieve domain configuration information from the binghamton
> domain's primary library server.
>
> You'll see that loncapa6 has no custom logo at bottom right of the log-in
> page, but does include a link to "Course/Community Catalog" as the fourth
> item below the Log in button (it is not shown on the log-in pages for your
> other servers).
>
> Can you check if there is a typo in: /home/httpd/lonTabs/domain.tab on
> loncapa6.
> That file should contain:
>
> binghamton:Binghamton University:::en-US::::binghamtonl1
>
> (The last item, after the eighth colon, is the lonHostID of the primary
> library server).
>
> You might also look in /home/httpd/perl/logs/lonnet.log on loncapa6 for
> this message: get_dom failed - no homeserver and/or domain (binghamton)
>
>
>
> Stuart Raeburn
> LON-CAPA Academic Consortium
>
>
> Quoting Bob Gonzales <rgonzal at binghamton.edu>:
>
> Stuart,
>>
>> I still get cannot access the user status pages on
>> loncapa6.chem.binghamton.edu while I can access all of the others.
>>
>> I dumped memcache and compared the following entries to those on another
>> server and they look the same.
>>
>> dns%3a%2fadm%2fdns%2fdomain
>> dns%3a%2fadm%2fdns%2fhosts
>> iphost%3aiphost
>>
>> There are no entries in lonmemcached_errors.
>>
>> I killed and restarted lonmemcached.  No changes, the Specific ip's' field
>> on the   is still blank on the 'Display/Edit Settings' page is still
>> blank.
>>
>> Something that is different about this server, compared to my other ones,
>> is that I had a disk failure and I reinstalled centos and loncapa.  This
>> machine is at the same level of centos, with the latest updates, just as
>> my
>> other servers are.  The loncapa string on the login page for all of the
>> servers is 2.11.1-2015053018.
>>
>> One other difference between this machine and the others, related to the
>> re-install, is that the library moved to another subnet back in January,
>> and the reinstall on loncapa6 happened in February.  I don't know what
>> difference this might make but I thought I'd include the info.
>>
>> Bob
>>
>>
>>
>>
>>
>> On Sun, Feb 21, 2016 at 11:28 AM, Stuart Raeburn <raeburn at msu.edu> wrote:
>>
>> Bob,
>>>
>>> I expect expiration of caches will have fixed this issue on binghamtona6
>>> by now, but if not ...
>>>
>>> ... The page it returns has the text 'Your
>>>
>>>> cookie information is incorrect.' in the body of the page.
>>>>
>>>>
>>> You will see that message if you attempt to access the user status page
>>> outside of a authenticated session (e.g., using wget) from an IP address
>>> that either (a) does not belong to one of your domain's LON-CAPA servers,
>>> or (b) is not one of the IP addresses for which access to the user status
>>> page has been specified in the domain configuration for your domain.
>>>
>>>
>>> If I log onto loncapa6 and go to the  'Display/Edit Settings' page, the
>>>> 'Specific ip's' field is blank. It is not blank if I do that on the
>>>> other
>>>> servers, it has the correct address in it.
>>>>
>>>>
>>>> That indicates that on binghamtona6 the current domain configuration was
>>> not retrieved from the primary library server in in your domain (i.e.,
>>> binghamtonl1).
>>>
>>>
>>>        An error occurred saving access settings for server status pages:
>>>> no_such_host.
>>>>
>>>>
>>>> That error message tells me that when binghamtona6 attempted to save the
>>> domain configuration settings for the binghamton domain to the primary
>>> library server in your domain (i.e., binghamtonl1), it failed to obtain a
>>> hostname for that server. That is consistent with the failure to retrieve
>>> the domain configuration information originally.
>>>
>>> In the case of failure to retrieve a hostname, given a lonhostID, I would
>>> recommend checking that the information cached in memcache on
>>> binghamtona6
>>> for the items:
>>>
>>> dns%3a%2fadm%2fdns%2fdomain
>>> dns%3a%2fadm%2fdns%2fhosts
>>> iphost%3aiphost
>>>
>>> look correct.
>>>
>>> My 2/9/2015 post to this mailing list included a perl script which can be
>>> run to dump the contents of memcached. See:
>>>
>>> http://mail.lon-capa.org/pipermail/lon-capa-admin/2015-February/003005.html
>>> .
>>>
>>> If it's not correct you might look in
>>> /home/httpd/perl/logs/lonmemcached_errors on binghamtona6 to see if
>>> anything is logged there.
>>>
>>> You can restart memcached on binghamtona6, either by restarting all the
>>> LON-CAPA daemons using /etc/init.d/loncontrol restart, or by restarting
>>> just  memcached, by retrieving the process ID (pid), killing that pid,
>>> and
>>> then starting loncontrol, i.e.,
>>>
>>> cat /home/httpd/perl/logs/lonmemcached.pid
>>> kill <pid>
>>> /etc/init.d/loncontrol start
>>>
>>>
>>> Stuart Raeburn
>>> LON-CAPA Academic Consortium
>>>
>>>
>>>
>>> Quoting Bob Gonzales <rgonzal at binghamton.edu>:
>>>
>>> I can't access the user status page on one of my servers from a remote
>>>
>>>> machine.  The server that  is not allowing access is
>>>> loncapa6.chem.binghamton.edu.  The page it returns has the text 'Your
>>>> cookie information is incorrect.' in the body of the page.   I can
>>>> access
>>>> it correctly from the command line on loncapa6.
>>>>
>>>> I can access all of my other server's user status page.
>>>>
>>>> The remote machine's that is requesting the pages was setup via the gui
>>>> 'Display/Edit Settings' page.
>>>>
>>>> If I log onto loncapa6 and go to the  'Display/Edit Settings' page, the
>>>> 'Specific ip's' field is blank.  It is not blank if I do that on the
>>>> other
>>>> servers, it has the correct address in it.  From loncapa6, if I try to
>>>> set
>>>> it to any value then I get the following message:
>>>>
>>>>        An error occurred saving access settings for server status pages:
>>>> no_such_host.
>>>>
>>>> loncapa6 seems to be working OK.  I can log on an choose various roles
>>>> and
>>>> do normal things.
>>>>
>>>> The system files /etc/hosts, and /etc/resolv.conf match up with the
>>>> other
>>>> servers.  The files in /home/httpd/lonTabs also seem consistent with the
>>>> same on the other access servers.
>>>>
>>>> Anyone have any suggestions on what else I can check?
>>>>
>>>> Thanks,
>>>> Bob Gonzales
>>>> Binghamton University
>>>> Chemistry Dept
>>>>
>>>>
>>> _______________________________________________
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>>> LON-CAPA-admin at mail.lon-capa.org
>>> http://mail.lon-capa.org/mailman/listinfo/lon-capa-admin
>>>
>>
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