[petsc-users] Petsc cannot be initialized on vesta in some --mode options

[Jed Brown]

Jeff Hammond <jeff.science at gmail.com> writes:
> I've always thought that MPI_Bcast wasn't actually the problem anyways
> but rather it was the POSIX calls that were breaking PETSc_Init.

Can you elaborate?  PETSc uses fopen on rank 0 (these are small
user-configuration files).  In this case, it made it through three of
these, then got an error in a size_t MPI_Bcast.  Setting
PAMID_COLLECTIVES=0 used to fix this.  I'll update later when I have
time to reproduce.
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