The Open MPI team has uncovered a serious bug in Open MPI v1.3.0 and v1.3.1: when running on OpenFabrics-based networks, silent data corruption is possible in some cases. There are two workarounds to avoid the issue -- please see the bug ticket that has been opened about this issue for further details:

We strongly encourage all users who are using Open MPI v1.3.0 and/or v1.3.1 on OpenFabrics-based networks to read this ticket and use one of the workarounds described there.

The Open MPI team is working on a fix; it will be included in the v1.3.2 release. Updates will be posted to the ticket.

Jeff Squyres
Cisco Systems

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