RE: [condor-users] Windows Condor disappearing/reappearing ongri d

["Heinz, Michael William" <michael_heinz@xxxxxxxxx>]

Does Windows 2000 use NTP?

-----Original Message-----
From: Mark Silberstein [mailto:marks@xxxxxxxxxxxxxxxxxxxxxxx] 
Sent: Saturday, November 15, 2003 4:19 AM
To: condor-users@xxxxxxxxxxx
Subject: RE: [condor-users] Windows Condor disappearing/reappearing on gri d


Hi,
I had quite a similar problem I'd reported about to condor-admin. 
I had an NTP (network time protocol) daemon running in the background and
changing time. So during the startd invocation it had one time stamp, but
then, when the time change happened due to NTP, startd was stopping sending
its classads. Tuning NTP to start before Condor in the startup scripts
solved the problem. 
Mark
On Fri, 2003-11-14 at 19:43, Heinz, Michael William wrote:
> Zach,
> 
> 	Thanks for the response - I am seeing "invalid session" messages in 
> the collector log.
> 
> 	I'll try your suggestion, but I am, in fact, using Condor 6.5.5, so 
> it looks like that problem hasn't been fixed after all. Do I need to 
> put the fix in all condor configs or just on the machine running the 
> collector?
> 
> -----Original Message-----
> From: Zachary Miller [mailto:zmiller@xxxxxxxxxxx]
> Sent: Friday, November 14, 2003 12:29 PM
> To: condor-users@xxxxxxxxxxx
> Subject: Re: [condor-users] Windows Condor disappearing/reappearing on
grid
> 
> 
> On Fri, Nov 14, 2003 at 12:13:01PM -0500, Heinz, Michael William 
> wrote:
> > No one ever responded to this problem, so I'm asking again:
> > 
> > I seem to be in a situation where machines disappear off the grid 
> > even
> > though they are both idle and continuing to operate. Rebooting each 
> > machine in question seems to relieve the problem. More strangely, it 
> > sometimes seems as if simply logging into the machine and doing a 
> > "condor_status" and waiting a few minutes is all that's needed.
> > 
> > Does anyone have any suggestions?
> 
> it looks like you are running into a bug with sessions expiring.  i'm 
> guessing that if you look in your CollectorLog, you'll see a bunch of 
> lines saying "attempt to open invalid session".
> 
> the bug was fixed in the 6.5 series.
> 
> if you'd like to work around it, you can turn off sessions entirely if 
> you are not using KERBEROS, X509, 3DES, BLOWFISH, MD5, or any other 
> security features.  simply add:
> 
>   SEC_DEFAULT_NEGOTIATION = NEVER
> 
> to your condor_config file.  let me know if you continue to have 
> troubles.
> 
> 
> cheers,
> -zach
> 
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