[mvapich-discuss] Q: MPI_ALLGATHERV causes Invalid communicator & comm=0x0

[Dhabaleswar Panda]

Manfred - Thanks for confirming that things are working well on your side
wrt the modified application and MVAPICH2 library.

For information to the list - An offline discussion was held on this issue
with Manfred. With the help from ANL folks, an error was found in the MPI
application (not in the MVAPICH2 library).

Since things are working smooth with the modified application, we are
closing this request.

Thanks,

DK

=============================

Date: Thu, 3 Jul 2008 18:32:20 +0200 (CEST)
From: Manfred Muecke <manfred.muecke at univie.ac.at>
To: mvapich-discuss at cse.ohio-state.edu
Subject: Q: MPI_ALLGATHERV causes Invalid communicator & comm=0x0

Hi,

I have the following problem and ran out of ideas. Maybe someone can help
with some advice.

I get the following error message from all instances of my MPI-program
(FORTRAN90), using MVAPICH2 1.0 (compiled with "mpe=mpicheck"):

Invalid communicator, error stack:
MPI_Comm_rank(107): MPI_Comm_rank(comm=0x0, rank=fffffd7fffdfd2bc) failed
MPI_Comm_rank(65).: Invalid communicator

The error is caused by a call to MPI_ALLGATHERV. It was discussed here
that a similiar looking error is caused by including the wrong mpi.h. This
one differs however in that comm=0x0 (the actual value of the communicator
was 1140850688).

"mpif90 -show" gives:

/opt/local/SunStudio12/SUNWspro/bin/f90
-xO3 -xtarget=opteron -m64
-I/opt/local/MVAPICH/mvapich2-1.0/include
-xO3
-M/opt/local/MVAPICH/mvapich2-1.0/include
-L/opt/local/MVAPICH/mvapich2-1.0/lib
-lmpichf90 -lmpichf90 -lmpich
-L/usr/lib/amd64
-L/usr/ucblib/amd64
-lsocket -lnsl -lresolv -lpthread -ldat -lrt -lnsl -lsocket

I have checked thoroughly and can not find any mpi.h from other
installations interfering. Any other ideas?

Thanks for your help, Manfred


--
Manfred M\303\274cke                manfred.muecke at univie.ac.at
Research Lab Computational Technologies and Applications
rlcta.univie.ac.at      Lenaugasse 2, 1080 Wien, AUSTRIA