PMI2 initialization failure

[derekmacklin]

I've just installed petsc and petsc4py on a cluster.

When, in an interactive session on a compute node, I run:

$ python -c "import petsc4py; petsc4py.init()"

I get the error message:

--------------------------------------------------------------------------
PMI2 failed to initialize, returning an error code of 14.
We cannot use PMI2 at this time, and your job will
likely abort.
--------------------------------------------------------------------------

As an aside, the system's /etc/slurm/slurm.conf does have the setting "MpiDefault=pmi2".

Not sure how to fix this--any advice? Can I initialize petsc4py without mpi (though I'd like to use mpi going forward)?

I'm happy to provide more output as needed.

[derekmacklin]

Upon further digging, this appears to be related to mpi4py:

$ python -c "from mpi4py import MPI"

--------------------------------------------------------------------------
PMI2 failed to initialize, returning an error code of 14.
We cannot use PMI2 at this time, and your job will
likely abort.
--------------------------------------------------------------------------

[derekmacklin]

The fix: on the cluster I'm using apparently I just need to call:

mpirun python -c "import petsc4py; petsc4py.init()"