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5.0.9 on Mac: MPI_Dist_graph_create randomly hangs

Status: Open.

#13918 In open-mpi/ompi;

· aprokop opened on May 29, 2026

[ULFM] coll_ftagree_agreement MCA parameter cannot be set, and MPIX_Comm_agree deadlocks cross-node (v5.0.8)

Status: Open.

#13915 In open-mpi/ompi;

· chzyao opened on May 25, 2026

MTT: it seems nightly builds of main and v6.0.x tarballs is not happening

Status: Open.

#13911 In open-mpi/ompi;

· hppritcha opened on May 22, 2026

Need to document that Open MPI does not work with recent (latest?) release of LSF

Status: Open.

#13902 In open-mpi/ompi;

· hppritcha opened on May 20, 2026

pmix2/prrte3 help files not found

Severity: critical

Status: Open.

#13886 In open-mpi/ompi;

· jngrad opened on May 8, 2026

Cannot build 5.0.10 tarball on Fedora 44 with GCC 16.0.1

Target: main

Target: v5.0.x

Target: v6.0.x

Status: Open.

#13847 In open-mpi/ompi;

· dalcinl opened on Apr 30, 2026

OpenMPI 4.1.8 with --map-by slot:PE=N N > 1 fails when > 1 node

Status: Open.

#13843 In open-mpi/ompi;

· bernstei opened on Apr 27, 2026

btl/smcuda: Message completion not properly waited if there was a cuda context switch after MPI_Init ?

Status: Open.

#13836 In open-mpi/ompi;

· AntonDaumen opened on Apr 21, 2026

compiling openmpi 4.1.8 g++ 14, cuda-aware, fails with a C++ error

Status: Open.

#13831 In open-mpi/ompi;

· bernstei opened on Apr 21, 2026

OMPIO creates persistent .lock files on Lustre FS with flock mount option enabled

State-Awaiting user information

Status: Open.

#13823 In open-mpi/ompi;

· denisbertini opened on Apr 14, 2026

btl/ofi: double free if fi_domain fails

Status: Open.

#13803 In open-mpi/ompi;

· devreal opened on Apr 2, 2026

Problems running CP2K-CI with OpenMPI parallelization

Target: v6.0.x

target:v5.0.xBackport targeting the v5.0.x branchBackport targeting the v5.0.x branch

Status: Open.

#13783 In open-mpi/ompi;

· Growl1234 opened on Mar 23, 2026