[torqueusers] Mom Terminates Job before it is run

Garrick Staples garrick at usc.edu
Wed Jul 11 14:18:06 MDT 2007


On Wed, Jul 11, 2007 at 02:55:18PM -0500, Adam Emerich alleged:
> torqueusers-bounces at supercluster.org wrote on 07/11/2007 01:36:41 PM:
> 
> > On Wed, Jul 11, 2007 at 01:07:43PM -0500, Adam Emerich alleged:
> > > torqueusers-bounces at supercluster.org wrote on 07/10/2007 01:49:28 PM:
> > >
> > > > On Tue, Jul 10, 2007 at 10:03:16AM -0500, Adam Emerich alleged:
> > > > > Jul 10 09:30:37 n01-001-0 pbs_mom: Success (0) in
> TMomFinalizeChild,
> > > cannot
> > > > > open qsub sock
> > > >
> > > > For interactive jobs, qsub creates and listens on a socket, and
> pbs_mom
> > > > must be able to connect to that socket.  If pbs_mom can't connect to
> > > > qsub, then job launch is a failure.
> > >
> > > In our case the management node has a hostname of mn, so the torque
> request
> > > to the mom is coming down with mn as the hostname.  The mom could
> > > communicate with the management node but needs to do so using mnc as
> the
> > > hostname for the management node.  Does the torque socket that is
> opened
> > > have limitations on where the connection comes from to have a
> successful
> > > connection?  In our case the outgoing traffic from the management node
> goes
> > > out on ip 172.16.0.1, however when the compute nodes communicate back
> to
> > > the management nodes, they will use 172.15.0.1.
> >
> > No, qsub doesn't care.
> >
> > Is the problem the other way around?  pbs_mom can't get to 'mn'?
> 
> Yes, I know that is the case.  Compute nodes cannot ping hostname mn.

That it is likely the problem.


> > You might try setting 'QSUBHOST mnc' in $PBS_SERVER_HOME/torque.cfg on
> > mn.
> 
> I will try this, but I don't see this option documented in the Torque Wiki.
> Is it a new option?  Also, I currently do not have a torque.cfg file in the
> $PBS_SERVER_HOME.  Is it ok to just create this file or does torque need to
> be configured and rebuilt to use it?

I'll add it to the wiki.  I need to add it to the manpage too.

-- 
Garrick Staples, GNU/Linux HPCC SysAdmin
University of Southern California

Please avoid sending me Word or PowerPoint attachments.
See http://www.gnu.org/philosophy/no-word-attachments.html
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