#2023: CarpetInterp hangs with openmpi ------------------------+--------------------------------------------------- Reporter: anonymous | Owner: Type: defect | Status: new Priority: unset | Milestone: Component: Other | Version: development version Resolution: | Keywords: OpenMPI, Carpet ------------------------+---------------------------------------------------
Comment (by hinder):
This looks very similar to what we encountered with OmniPath on Minerva, which held up the acceptance for a few months. In that case, it was a bug in the OmniPath driver, which Intel eventually found and fixed, using our reproducible example. It looks the same on surface (a hang in MPI_Alltoallv), but you are using OpenMPI and infiniband, whereas we were using Intel MPI and OmniPath, so unfortunately this doesn't seem to be the same problem. You could also try compiling without optimisation to see if that gives better backtraces.
Is your problem reproducible? What cluster is this? Have you tried different OpenMPI versions, or a different MPI implementation?