Also control importing of petsc4py with the use of OPENMDAO_REQUIRE_MPI #1445
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…e to tell OpenMDAO to not import mpi4py or pestc4py
Kenneth-T-Moore
approved these changes
Jun 2, 2020
naylor-b
approved these changes
Jun 2, 2020
robfalck
approved these changes
Jun 8, 2020
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Summary
The environment variable OPENMDAO_REQUIRE_MPI affected the importing of mpi4y but not petsc4py. This PR fixes that.
This issue came up because if the user's MPI install was corrupt, it was impossible to even run serial code. This gives the user to force serial mode and not import even petsc4py.
This fix actually does not completely solve the problem. Since OpenMDAO uses pyoptsparse, and since pyoptsparse also uses mpi4py, the user still will have issues. So a PR was submitted to the pyoptsparse repo, with the blessing of that team, to have a similar environment variable
PYOPTSPARSE_REQUIRE_MPIto give explicit control over running in parallel or serial.Related Issues
Backwards incompatibilities
None
New Dependencies
None