[LON-CAPA-admin] Issues

Stuart Raeburn raeburn at msu.edu
Tue Nov 15 18:50:54 EST 2011


Mark,

> I thought I remembered the loncnew has a way to toggle the debug on
> and off.

You remembered correctly -- but that is for loncnew, and affects  
logging by lonc to lonc.log.

For loncnew, debug logging depends on the value of $LogTransactions.
When True, all transactions/replies get logged.

 From the commit log for loncnew rev. 1.39 (1/13/2004)

"Added capability for transaction logging. To toggle between 'normal'  
operation
and transaction logging and back, send USR2 at a specific lonc daemon.
Transactions are logged in the /home/httpd/perl/lonc.log file with success
status, as normal log messages."

> Is there a comparable behavior upon an interrupt to lond?
> I didn't think there was.

There isn't.

Stuart Raeburn
MSU LON-CAPA group



Quoting "Lucas, Mark" <lucasm at ohio.edu>:

> Hmm ... It's set to 0, and I don't see anything strange in the Debug
> subroutine.
>
> I thought I remembered the loncnew has a way to toggle the debug on
> and off. Is there a comparable behavior upon an interrupt to lond?
> I didn't think there was.
>
> Mark
>
> On Nov 15, 2011, at 6:11 PM, Stuart Raeburn wrote:
>
> Hi,
>
> Tue Nov 15 05:26:57 2011 (21584): Command received: ekey, encoded = 0
> Tue Nov 15 05:26:57 2011 (21584): Matched dispatch hash: mustencode:
>
> That is odd.
> You should only see that level of detail in lond.log if you have:
>
> my $DEBUG=1;
>
> set in /home/httpd/perl/lond
>
> I don't see it showing up in /home/httpd/perl/lond.log otherwise.
>
> If you are sure that:
>
> my $DEBUG-0;
>
> is set (and you have restarted loncontrol), then it seems you should
> look at the Debug subroutine in lond, which should be:
>
> sub Debug {
>     my $message = shift;
>     if($DEBUG) {
> &logthis($message);
>     }
> }
>
> To stop the excessive logging, regardless of the value of $DEBUG you
> could change it to:
>
> sub Debug {
>     my $message = shift;
>     return;
> }
>
> and restart loncontrol
>
> Stuart Raeburn
> MSU LON-CAPA group
>
>
> Quoting "Lucas, Mark" <lucasm at ohio.edu<mailto:lucasm at ohio.edu>>:
>
> I'm having some issues here I may need help with.
>
> We're working towards finals starting tomorrow, and last night I had
> one of my machines
> go catatonic regarding LON-CAPA and httpd. I was still able to get
> in via ssh.
> This seems to be correlated with memory problems.
>
> I restarted LON-CAPA (loncontrol and httpd) on that machine and did
> the same on
> my balancer, and it seemed to be fine.
>
> Just about an hour ago I started having problems again. There seems
> to be a significant
> increase in memory usage - the slope changed pretty dramatically as
> usage picked up.
>
> While the machines are being used pretty steadily, I'm wondering if
> there's anything regarding
> downloading of large pdf files or the like that may somehow be
> causing grief. They're not
> working on homework as much as they are pouring over lecture notes.
>
> I also found the lond.log file on my library to be huge (3Gb+?) last
> night. While there typically
> isn't much in lond.log, and I have debug set to zero, I'm getting a
> bunch of messages like those shown
> below. Is this a sign of poor communications between the machines
> developing under the load?
> Is debug somehow getting turned on?
>
> I'm at a bit of a loss for the behavior, and I definitely have some
> students pissed at me right
> now.
>
> Mark
>
>
> ============================================================
> Tue Nov 15 05:26:57 2011 (21584): Command received: sethost, encoded = 0
> Tue Nov 15 05:26:57 2011 (21584): Matched dispatch hash: mustencode:
> 0 ClientType 1Tue Nov 15 05:26:57 2011 (21584): Dispatching to
> handler sethost oucapa2
> Tue Nov 15 05:26:57 2011 (21584): Request was sethost:oucapa2  Reply was ok
> Tue Nov 15 05:26:57 2011 (21584): get_request: Request = ekey
>
> Tue Nov 15 05:26:57 2011 (21584): Main: Got ekey
> Tue Nov 15 05:26:57 2011 (21584): process_request: ekey
>
> Tue Nov 15 05:26:57 2011 (21584): Command received: ekey, encoded = 0
> Tue Nov 15 05:26:57 2011 (21584): Matched dispatch hash: mustencode:
> 0 ClientType 3Tue Nov 15 05:26:57 2011 (21584): Dispatching to
> handler ekey
> Tue Nov 15 05:26:57 2011 (21584): Request was ekey:  Reply was
> 7643ACBACEB8A7BAE8DBCE811563Tue Nov 15 05:26:57 2011 (21584):
> get_request: Request =
> sethost:oucapa2:put:ohiou:OUp200lib:nohist_resevaldata:author%2fmeap%2fcalculus%2fprecalcreview%2ftrig02%2dRadiansToDegrees%2eprobl
> em___ohiou%2fOUp200lib%2fmath%2ftriangle_comp1%2eproblem___comefrom=1
>
> Tue Nov 15 05:26:57 2011 (21584): Main: Got
> sethost:oucapa2:put:ohiou:OUp200lib:nohist_resevaldata:author%2fmeap%2fcalculus%2fprecalcreview%2ftrig02%2dRadiansToDegrees%2eproblem___ohiou%2f
> OUp200lib%2fmath%2ftriangle_comp1%2eproblem___comefrom=1
>
> Tue Nov 15 05:26:57 2011 (21584): process_request:
> put:ohiou:OUp200lib:nohist_resevaldata:author%2fmeap%2fcalculus%2fprecalcreview%2ftrig02%2dRadiansToDegrees%2eproblem___ohiou%2fOUp200lib
> %2fmath%2ftriangle_comp1%2eproblem___comefrom=1
>
> Tue Nov 15 05:26:57 2011 (21584): Command received: put, encoded = 0
> Tue Nov 15 05:26:57 2011 (21584): Matched dispatch hash: mustencode:
> 0 ClientType 1
> Tue Nov 15 05:26:57 2011 (21584): Dispatching to handler put
> ohiou:OUp200lib:nohist_resevaldata:author%2fmeap%2fcalculus%2fprecalcreview%2ftrig02%2dRadiansToDegrees%2eproblem___ohiou%2fOUp
> 200lib%2fmath%2ftriangle_comp1%2eproblem___comefrom=1
> Tue Nov 15 05:26:57 2011 (21584): Request was
> put:ohiou:OUp200lib:nohist_resevaldata:author%2fmeap%2fcalculus%2fprecalcreview%2ftrig02%2dRadiansToDegrees%2eproblem___ohiou%2fOUp200lib%2fma
> th%2ftriangle_comp1%2eproblem___comefrom=1  Reply was ok
> Tue Nov 15 05:27:09 2011 (21508): get_request: Request = exit
>
> Tue Nov 15 05:27:09 2011 (21508): Main: Got exit
> ========================================================================
>
>
>
> --
> Mark Lucas  email: lucasm at ohiou.edu<mailto: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
>
>
> _______________________________________________
> LON-CAPA-admin mailing list
> LON-CAPA-admin at mail.lon-capa.org<mailto:LON-CAPA-admin at mail.lon-capa.org>
> http://mail.lon-capa.org/mailman/listinfo/lon-capa-admin
>
> --
> Mark Lucas  email: lucasm at ohiou.edu<mailto: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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