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Nonblocking file I/O is silently lost when the aio queue fills (macOS), and one refusal disables it for the process

Status: Open.

#14278 In open-mpi/ompi;

· eschnett opened on Aug 4, 2026

What is the expected timeline for MPI 5.0 / OpenMPI 6 ?

question

Target: v6.0.x

Status: Open.

#14223 In open-mpi/ompi;

· amckinstry opened on Jul 29, 2026

recommonmark is deprecated and archived, please move to myst-parser

Status: Open.

#14214 In open-mpi/ompi;

· LecrisUT opened on Jul 27, 2026

[v.6.0.x] Confusing deprecated variable warning

Status: Open.

#14212 In open-mpi/ompi;

· dalcinl opened on Jul 26, 2026

Open MPI osc/rdma over OFI crashes after MPI_Win_allocate with multiple local ranks

Status: Open.

#14203 In open-mpi/ompi;

· jeffhammond opened on Jul 23, 2026

MPI_Accumulate loses updates with a one-element indexed datatype over UCX/InfiniBand

Status: Open.

#14181 In open-mpi/ompi;

· jeffhammond opened on Jul 20, 2026

osc/ucx: MPI_Accumulate with derived datatypes SIGSEGVs (NULL deref in the reduction) on the short-message path

Status: Open.

#14175 In open-mpi/ompi;

· jeffhammond opened on Jul 18, 2026

4.x bug: MPI_Get_accumulate / MPI_Rget_accumulate with MPI_REPLACE hang across nodes on IB

Status: Open.

#14173 In open-mpi/ompi;

· jeffhammond opened on Jul 17, 2026

--map-by dist not working (anymore) / --map-by device=gpu wanted

Status: Open.

#14169 In open-mpi/ompi;

· christgau opened on Jul 14, 2026

Open MPI program stops to work due to ptrace linux kernel vulnerability CVE-2026-46333

Status: Open.

#14160 In open-mpi/ompi;

· jfikar opened on Jul 13, 2026

Partitioned communication fixes on main that were never back-ported to v5.0.x

Target: v5.0.x

Status: Open.

#14157 In open-mpi/ompi;

· jsquyres opened on Jul 12, 2026

A compilation error occurs when Making all in mca/base

Status: Open.

#14153 In open-mpi/ompi;

· Jaden-Anderson opened on Jul 12, 2026