Yes, this is a problem, but not quite in the way you describe (I think
a hodgepodge of BTLs for final connectivity is fine).
I found similar issues a while ago if the openib BTL opens properly
but then fails in add_procs() for some reason. Check out these
tickets -- 1434 points to some
I'm not exactly sure where the fix to this should be, but I think I've
found a problem.
Consider, for illustration, launching a multi-process job on a single
node. The function
mca_bml_r2_add_procs()
calls
mca_btl_sm_add_procs()
Each process could conceivably return a different
