[mpich-discuss] Problems using MPI_File functions

[Rob Latham]

On Wed, Aug 22, 2012 at 01:48:29PM +0200, Pablo Guaza Peces wrote:
> Hi everybody!
> I'm having some problems using MPI_File functions. I made a very
> simple program to test it after one of my users had some issues with
> a more complicated program.
> 
> This is the program I'm using:

sure seems like a simple enough program.

> If I run this program with a PBS script only using one of my nodes
> it works well, but if I use two nodes, it creates the file but
> afterwards it just keeps running, and I have to kill it.
> 
> I think this might has something to do with the NFS share that the
> programs is using to create the file, but I don't really know. Could
> it be a NFS locking issue?

It's true we don't pay a lot of attention to NFS, but I can't
reproduce the problem here.  Any chance you can attach a debugger to
the stuck processor and let me know what the backtrace looks like?

thanks
==rob

-- 
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA