Re: [Condor-users] Wrong hostname in Condor-G file staging

[Jaime Frey <jfrey@xxxxxxxxxxx>]

On Jan 25, 2008, at 6:47 AM, Jan Ploski wrote:

> condor-users-bounces@xxxxxxxxxxx schrieb am 01/24/2008 11:12:19 PM:
>
> > Hello,
> >
> > Condor-G (from a 6.7.18 installation) is misbehaving on a machine  
> > which
> > has two IP addresses and two different hostnames. The internal  
> > hostname
> > (not mapped in the global DNS) keeps appearing in the
> > sourceUrl/destinationUrl fields of the SOAP message used to request  
> > file
>
> > staging from WS-GRAM, causing the job to be held with the "Globus  
> > error:
>
> > Staging error for RSL element fileStageIn" message.
> >
> > How can we make Condor-G use the external hostname instead of the
> > internal one? Am I right in assuming that the wrong hostname  
> > resolution
> > is performed somewhere in the Condor implementation and not in the
> > GAHP/Globus Java components (i.e., do they get the RSL with the  
> > resolved
>
> > hostname from condor_schedd or how does it work)?
>
> The problem is solved, so I will answer myself for the archive:
>
> The hostname resolution seems to happen in the condor_gridmanager  
> process,
> spawned by condor_schedd. The GAHP server which interfaces with the
> Condor-shipped Globus components is in turn spawned by the
> condor_gridmanager. GAHP most likely receives the (correctly or
> incorrectly) resolved hostname from condor_gridmanager.
>
> The submission host's IP address set on its "external world" network
> interface was being resolved via DNS to an internal hostname. To  
> prevent
> this, the /etc/hosts file was edited so that this IP address is  
> resolved
> to the external hostname. I'm still puzzled a bit about the workings  
> of
> the hostname resolution mechanism, but the SOAP messages now contain  
> the
> correct hostname.


A correction for the archives:
The globus-gridftp-server launched by the gridmanager to handle the  
file transfers picks the hostname to use.

Thanks and regards,
Jaime Frey
UW-Madison Condor Team