[MPICH] Problems with mpd

[Rajeev Thakur]

Is it possible that the user's path on the slave points to an mpd that was
not installed by root? In that case, the mpdroot file will not have the
setuid root bit set, and mpd will not be able to read /etc/mpd.conf.
 
Rajeev


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From: owner-mpich-discuss at mcs.anl.gov
[mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Gaetano Bellanca
Sent: Thursday, February 14, 2008 5:25 PM
To: mpich-discuss at mcs.anl.gov
Subject: [MPICH] Problems with mpd


Hi,

I'm trying to set-up mpich2 (last version) on a linux cluster (ubuntu gutsy)
and I'm having some problems using root mpd from a normal user. I'm
following the tests indicated in the manual, and everything is fine using
mpd as a normal user.

Running mpd at boot from root, when I'm on the server machine, a normal user
is able to run mpiexec -n 1 hostname getting the correct hostname answer.

On the slave machine, on the contrary, it results with the following
message:

/opt/mpich2/1.0.6p1/intel10.1/bin/mpdroot: open failed for root's mpd conf
filempiexec_cluster3 (__init__ 1190): forked process failed; status=255

It seems to be a problem relevant to the /etc/mpd.conf file. But this file
is the same I have on the server (with same permissions).

The command is executed regularly on the slave machine with sudo mpiexec -n
1 hostname.

Could it be a problem relevant to the fact that, the mpich2 directory is
mounted from the server via nfs?

Regards.

Gaetano




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Gaetano Bellanca - Department of Engineering - University of Ferrara  
Via Saragat, 1 - 44100 - Ferrara - ITALY             
Voice (VoIP):  +39 0532 974809     Fax:  +39 0532 974870
mailto:gaetano.bellanca at unife.it 

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