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Subject: Re: [OMPI users] Problem moving from 1.4 to 1.6
From: Gus Correa (gus_at_[hidden])
Date: 2014-06-27 13:44:32


It may be easier to install the latest OMPI from the tarball,
rather than trying to sort out the error.

http://www.open-mpi.org/software/ompi/v1.8/

The packaged built of (somewhat old) OMPI 1.6.2 that came with
Linux may not have built against the same IB libraries, hardware,
and configuration you have.
[The error message reference to udapl is ominous.]

> The mpirun command line contains the argument '--mca btl ^openib', which
> I thought told mpi to not look for the ib interface.

As you said, the mca parameter above tells OMPI not to use openib,
although it may not be the only cause of the problem.
If you want to use openib switch to
--mca btl openib,sm,self

Another thing to check is whether there is a mixup of enviroment
variables, PATH and LD_LIBRARY_PATH perhaps pointing to the old OMPI
version you may have installed.

My two cents,
Gus Correa

On 06/27/2014 12:53 PM, Jeffrey A Cummings wrote:
> We have recently upgraded our cluster to a version of Linux which comes
> with openMPI version 1.6.2.
>
> An application which ran previously (using some version of 1.4) now
> errors out with the following messages:
>
> librdmacm: Fatal: no RDMA devices found
> librdmacm: Fatal: no RDMA devices found
> librdmacm: Fatal: no RDMA devices found
>
> --------------------------------------------------------------------------
> WARNING: Failed to open "OpenIB-cma" [DAT_INTERNAL_ERROR:].
> This may be a real error or it may be an invalid entry in the
> uDAPL
> Registry which is contained in the dat.conf file. Contact your
> local
> System Administrator to confirm the availability of the
> interfaces in
> the dat.conf file.
>
> --------------------------------------------------------------------------
> [tupile:25363] 2 more processes have sent help message
> help-mpi-btl-udapl.txt / dat_ia_open fail
> [tupile:25363] Set MCA parameter "orte_base_help_aggregate" to
> 0 to see all help / error messages
>
> The mpirun command line contains the argument '--mca btl ^openib', which
> I thought told mpi to not look for the ib interface.
>
> Can anyone suggest what the problem might be? Did the relevant syntax
> change between versions 1.4 and 1.6?
>
>
> Jeffrey A. Cummings
> Engineering Specialist
> Performance Modeling and Analysis Department
> Systems Analysis and Simulation Subdivision
> Systems Engineering Division
> Engineering and Technology Group
> The Aerospace Corporation
> 571-307-4220
> jeffrey.a.cummings_at_[hidden]
>
>
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