[mpich-discuss] MPI Fatal error, but only with more cluster nodes!

[Rajeev Thakur]

Try running the cpi example from the MPICH2 examples directory across two machines. There could be a connection issue between the two machines.

Rajeev

On Sep 2, 2010, at 8:20 AM, Fabio F.Gervasi wrote:

> Hi,
> 
> I have a "strange" MPI problem when I run a WRF-NMM model, compiled with Intel v11.1.072 (by GNU run ok!).
> Mpich2-1.2 also is compiled by Intel.
> 
> If I run on a single Quad-core machine everything is ok, but when I try on two or more Quad-core machine,
> initially the wrf.exe processes seem start on every pc, but after few second wrf stop and I get the error:
> Fatal error in MPI_Allreduce other mpi error error stack.. and so on...
> 
> I just set: "ulimit -s unlimited", otherwise wrf crash also with a single machine...
> 
> This probably is an MPI problem, but how can I fix it?
> 
> Thank you very much
> Fabio.
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