[Dune] GMSH reader fails in parallel case

[Sacconi, Andrea]

Hi DUNErs,

I would like to ask you a question about the GMSH reader for parallel computation (with open-MPI 1.6.5). I am using AlugridSimplex <3,3> for a standard Poisson problem.
Everything is fine in the sequential case, while in the parallel case I get the error reported below.

as7211 at macomp01:~/dune-2.3.1/dune-bulk/src$ mpirun -n 2 dune_bulk
Reading 3d Gmsh grid...
Reading 3d Gmsh grid...
version 2.2 Gmsh file detected
version 2.2 Gmsh file detected
file contains 3323 nodes
file contains 3323 nodes
file contains 19216 elements
file contains 19216 elements
terminate called after throwing an instance of 'Dune::GridError'
[macomp01:03890] *** Process received signal ***
[macomp01:03890] Signal: Aborted (6)
[macomp01:03890] Signal code:  (-6)
[macomp01:03890] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x10340) [0x7ff363b7b340]
[macomp01:03890] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x39) [0x7ff3637dbf79]
[macomp01:03890] [ 2] /lib/x86_64-linux-gnu/libc.so.6(abort+0x148) [0x7ff3637df388]
[macomp01:03890] [ 3] /usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZN9__gnu_cxx27__verbose_terminate_handlerEv+0x155) [0x7ff3643056b5]
[macomp01:03890] [ 4] /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x5e836) [0x7ff364303836]
[macomp01:03890] [ 5] /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x5e863) [0x7ff364303863]
[macomp01:03890] [ 6] /usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x5eaa2) [0x7ff364303aa2]
[macomp01:03890] [ 7] dune_bulk(_ZN4Dune16ALU3dGridFactoryINS_7ALUGridILi3ELi3ELNS_18ALUGridElementTypeE0ELNS_21ALUGridRefinementTypeE1EP19ompi_communicator_tEEE12insertVertexERKNS_11FieldVectorIdLi3EEE+0x1b2) [0x616c82]

Any idea about how to use make only the master process read the grid, and not all the processes? In any case, how can the issue be fixed?
By the way, if I use DGF reader everything runs fine, both in the sequential and parallel case.

Thanks in advance!
Andrea
__________________________________________________________

Andrea Sacconi
PhD student, Applied Mathematics
AMMP Section, Department of Mathematics, Imperial College London,
London SW7 2AZ, UK
a.sacconi11 at imperial.ac.uk