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Description
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Background information
OpenMPI 4.0.0 is reporting an error message (see below) and claiming that there is an error initializing an OpenFabrics device.
What version of Open MPI are you using? (e.g., v1.10.3, v2.1.0, git branch name and hash, etc.)
4.0.0
Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)
openmpi-4.0.0.tar.gz (GA release)
Please describe the system on which you are running
- Operating system/version: RHEL 7.6
- Computer hardware: Intel Haswell-based Dell SOS6320s (E5-2698 v3 @ 2.30GHz)
- Network type: InfiniBand (Mellanox Connectx-3 FDR, mlx4)
ucx-1.4.0-1.el7.x86_64
ucx-devel-1.4.0-1.el7.x86_64
Details of the problem
I'm encountering the following message despite having built with UCX library support which works fine with OpenMPI 3.1.2
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By default, for Open MPI 4.0 and later, infiniband ports on a device
are not used by default. The intent is to use UCX for these devices.
You can override this policy by setting the btl_openib_allow_ib MCA parameter
to true.
Local host: c36a-s39
Local adapter: mlx4_0
Local port: 1
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