Package: libopenmpi3 Followup-For: Bug #965352 mpi4py upstream (Lisandro Dalcin) suggests in the short term to skip the failing mpi4py tests for openmpi 4.0.4 (the failing tests are in test_rma.py and test_rma_nb.py, and also one in test_win.py)
Lisandro suggests also it could be helpful for catching these problems if OpenMPI upstream included an mpi4py test in its CI testing. Would you be able to convince OpenMPI upstream to do this? (I'll mention the idea to yosefe in the UCX bug report). I've added a patch to skip the problematic tests in mpi4py 3.0.3-6. I'll leave it to you to judge whether that's enough to close this libopenmpi3 bug, or whether we should keep it open (and downgrade severity). Drew