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

["Griffith, Brent" <brent_griffith@xxxxxxxx>]

I would check that the windows boxes aren't going into a power saving
standby mode... [e.g. control panel->power options -> System Standby:never]

> -----Original Message-----
> From: Heinz, Michael William [mailto:michael_heinz@xxxxxxxxx]
> Sent: Friday, November 14, 2003 10:43 AM
> To: 'condor-users@xxxxxxxxxxx'
> Subject: RE: [condor-users] Windows Condor disappearing/reappearing on
> gri d
> 
> 
> 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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