MPI Test fails when run in certain number of node

[bodhinandach]

Describe the bug I just noticed that ./mpmtest in develop fails when run in by using mpirun for -n 4. I am not sure whether this is just in my machine or not. It works okay for all other sizes of rank.

To Reproduce Steps to reproduce the behavior:

1. Compile develop using the following:

   cmake ..                                                \
   -DCMAKE_BUILD_TYPE=Release                              \
   -DCMAKE_CXX_COMPILER=mpicxx                             \
   -DKAHIP_ROOT=/directory/KaHIP          \
   -DMPM_BUILD_LIB=On                                      \
   -DHALO_EXCHANGE=On        

2. Run on mpirun -n 4 ./mpmtest [mpi]
3. You may have the following error:

Runtime environment (please complete the following information):

• OS: Linux Ubuntu 20.04
• Branch [e.g. develop]

Additional context As I mentioned above, the test run completely fine in other number of rank.

[kks32]

The MPI test is specific for 4 threads, and seems to run fine on Fedora and CircleCI nightly builds and regular builds: https://app.circleci.com/pipelines/github/cb-geo/mpm/921/workflows/b4202709-791c-4d84-b1d3-748a7a86f9fb/jobs/5298.

Could you try running the MPI test without building a shared object library, i.e., set -DMPM_BUILD_LIB=Off.

[bodhinandach]

Thanks @kks32, I set -DMPM_BUILD_LIB=Off and it works! Should it be turned off all the time we are running using mpirun?

[kks32]

I think it would be good to remove the build lib option, so we don't have this error.