[OMPI users] OMPI returns error 63 on AMD 7742 when utilizing 100+ processors per node

[Collin Strassburger via users]

Hello,

I am having difficulty with OpenMPI versions 4.0.2 and 3.1.5.  Both of these 
versions cause the same error (error code 63) when utilizing more than 100 
cores on a single node.  The processors I am utilizing are AMD Epyc "Rome" 
7742s.  The OS is CentOS 8.1.  I have tried compiling with both the default gcc 
8 and locally compiled gcc 9.  I have already tried modifying the maximum name 
field values with no success.

My compile options are:
./configure
     --prefix=${HPCX_HOME}/ompi
     --with-platform=contrib/platform/mellanox/optimized

Any assistance would be appreciated,
Collin

Collin Strassburger
Bihrle Applied Research Inc.