[mpich-announce] Announcing the availability of MPICH 3.4.1

Raffenetti, Kenneth J. raffenet at mcs.anl.gov
Tue Jan 26 14:12:50 CST 2021

A new stable release of MPICH, 3.4.1, is now available for download. This is the first bug-fix release in the 3.4.x series. This release contains critical fixes for GPU support and addresses a compatibility issue for MPI applications that use jansson (https://digip.org/jansson/) for manipulating JSON data.

You can find the release on our downloads page (https://www.mpich.org/downloads/). Production environments are encouraged to upgrade to this release.

The MPICH team

                               Changes in 3.4.1

# Fix bug in GPU memory hooks that caused failures with NCCL

# Fix bug in GPU-aware nonblocking op collectives

# Hide symbols from embedded json-c module

# Removed anonymous struct/union usage in MPL

# Disable Java support in embedded UCX module

   A full list of changes is available at the following link:


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