An error occurs when mpi4py.futures.MPIPoolExecutor with openmpi is called

Sometimes like the following error occurs when mpi4py.futures.MPIPoolExecutor with openmpi is called.

[r5i7n2:26205] [[60041,0],0] ORTE_ERROR_LOG: Not found in file orted/pmix/pmix_server_dyn.c at line 87

If you faced the error, please try ether the one of the following:

1. mpirun -np <NP> python3 -m mpi4py.futures ./

2. use mpi4py with intel MPI