A new stable release of MPICH, 3.4.3, is now available for download. This is the third bug-fix release in the 3.4.x series. This release contains improvements and fixes for Hydra, GPU support, ROMIO, datatypes, and other user-reported bugs and build issues. You can find the release on our downloads page (https://www.mpich.org/downloads/). Production environments are encouraged to upgrade to this release. Regards, The MPICH team =============================================================================== Changes in 3.4.3 =============================================================================== # Fix bugs in GPFS ROMIO driver # Fix bugs in DAOS ROMIO driver # Fix nemesis shm bug on systems with weak memory consistency # Fix progress issue in ch4:ucx finalize # Fix nonblocking collective issue during finalize # Fix UBSan warnings in 32-bit builds # Fix predefined datatype handle leaks # Fix bug in topology-aware communicator creation # Fix Slurm nodelist parsing # Fix testcase for out-of-tree configuration # Fix truncation testcase for possible disconnection error # Hydra help message improvements # Add support for DAOS pool and container labels A full list of changes is available at the following link: https://github.com/pmodels/mpich/compare/v3.4.2…v3.4.3