[Debichem-devel] Bug#720419: Aw: Bug#720419: Openmpi 1.6.5 is freezing under GNU/Linux ia64

[Steffen Möller]

Hello,

> In Debian, we are in the process of switching the default MPI
> implementation from version 1.4 to 1.6.
> 
> Every architectures are fine beside ia64. Any program based on OpenMPI
> 1.6.5 is freezing.
> 
> With a basic test case:
>   MPI_Init(NULL, NULL);
>   MPI_Finalize();
> 
> mpirun -c 4 foo
> => freeze
> The backtrace does not show anything.
> 
> Does it ring a bell to anyone ?

Do you observe this on a single machine or via a network? I suggest
editing your nodes list to identify the hosts that make problems.

I also experienced the freeze for heterogeneous setups of 1.4 and 1.6 versions.
In a homogeneous setup, the direct execution e.g. of "hostname" always works.
But there is something that I have done to a prior working homogeneous 1.6
setup across three nodes that now freezes when I execute GROMACS' mdrun,
if a single particular node is allowed to contribute.

Steffen