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Subject: [OMPI users] Problems with shared libraries while launching jobs
From: Blosch, Edwin L (edwin.l.blosch_at_[hidden])
Date: 2012-12-14 15:17:39

I am having a weird problem launching cases with OpenMPI 1.4.3. It is most likely a problem with a particular node of our cluster, as the jobs will run fine on some submissions, but not other submissions. It seems to depend on the node list. I just am having trouble diagnosing which node, and what is the nature of the problem it has.

One or perhaps more of the orted are indicating they cannot find an Intel Math library. The error is:
/release/cfd/openmpi-intel/bin/orted: error while loading shared libraries: cannot open shared object file: No such file or directory

I've checked the environment just before launching mpirun, and LD_LIBRARY_PATH includes the necessary component to point to where the Intel shared libraries are located. Furthermore, my mpirun command line says to export the LD_LIBRARY_PATH variable:
Executing ['/release/cfd/openmpi-intel/bin/mpirun', '--machinefile /var/spool/PBS/aux/20761.maruhpc4-mgt', '-np 160', '-x LD_LIBRARY_PATH', '-x MPI_ENVIRONMENT=1', '/tmp/fv420761.maruhpc4-mgt/falconv4_openmpi_jsgl', '-v', '-cycles', '10000', '-ri', 'restart.1', '-ro', '/tmp/fv420761.maruhpc4-mgt/restart.1']

My shell-initialization script (.bashrc) does not overwrite LD_LIBRARY_PATH. OpenMPI is built explicitly --without-torque and should be using ssh to launch the orted.

What options can I add to get more debugging of problems launching orted?