[torqueusers] pbs_iff cannot authenticate user

Garrick Staples garrick at usc.edu
Tue Oct 25 12:53:22 MDT 2005

On Tue, Oct 25, 2005 at 01:44:00PM +0200, Philipp Cain alleged:
> Hello,
> while adding a HP-UX node to a working Torque/Maui-Linux environment I 
> ran into the following problem:
> On the HP node qstat,qmgr,pbsnodes etc. is working only sporadically. 
> Usually the commands results in the error message (with PBSDEBUG=yes)
> >qstat
> pbs_iff:  MSG=cannot authenticate user
> ALERT:  cannot read pipe, rc=0, errno=0 (Error 0)
> ERROR:  cannot authenticate connection, errno=0 (Error 0)
> No Permission.
> qstat: cannot connect to server warp31.physik.tu-chemnitz.de (errno=15007)

Does it work as root?  Is pbs_iff setuid root?

Can you run pbs_iff in test mode?   It should go something like this:
   $ pbs_iff -t warp31.physik.tu-chemnitz.de 15001
   $ echo $?

> At the same time the server log says:
> 10/24/2005 17:28:12;0100;PBS_Server;Req;;Type AuthenticateUser request 
> received from cain at nischel1.physik.tu-chemnitz.de, sock=12
> 10/24/2005 17:28:12;0080;PBS_Server;Req;req_reject;Reject reply 
> code=15019( MSG=cannot authenticate user), aux=0, type=AuthenticateUser, 
> from cain at nischel1.physik.tu-chemnitz.de
> Nevertheless I can send jobs to the HP node when submitting from a Linux 
> PBS client or from the PBS Server.

That's good.  MOM<->Server connections don't require a AuthenticateUser
req first, so we know the problem isn't very deep.

> First I thought of a timeout problem. So I increased  tcp_timeout, which 
> didn't change anything.
> Here is the server setup:
>       acl_host_enable = True
>       acl_hosts = *.physik.tu-chemnitz.de

Can the server get proper DNS forward and reverse resolution of

If the pbs_iff stuff above is all true, does acl_host_enable=F allow the
client to connect?

Garrick Staples, Linux/HPCC Administrator
University of Southern California
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