Segmentation Fault in hypre_MPI_Bcast

[kumarvrai]

Hello,
I am trying to run a CFD code (https://github.com/Nek5000/Nek5000) that uses Hypre preconditioners.
Everything compiles well bit I get segmentation fault during run time (log attached). There is some problem during hypre_MPI_Bcast call.
I am not sure about the cause, but the same code runs on a different cluster flawlessly. So, I guess there must be some issue with compilers/environment etc.

Any help is appreciated.

Vishal

Currently Loaded Modules:

1. ucx/1.16.0-gcc 2) openmpi/5.0.5-gcc 3) gcc/12.3.0 4) cmake/3.25.1 5) bsc/1.0

---

*HYPRE_Int
hypre_MPI_Bcast( void buffer,
HYPRE_Int count,
hypre_MPI_Datatype datatype,
HYPRE_Int root,
hypre_MPI_Comm comm )
{
return (HYPRE_Int) MPI_Bcast(buffer, (hypre_int)count, datatype,
(hypre_int)root, comm);
}

/ proc 0 has the first row and col /
if (myid==0)
{
info[0] = ilower;
info[1] = jlower;
}
hypre_MPI_Bcast(info, 2, HYPRE_MPI_INT, 0, comm);

---

Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0 0x7f7a23b0edef in ???
#1 0x7f7a2417e891 in ???
#2 0x61ef2f in hypre_MPI_Bcast
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/3rd_party/hypre/hypre/src/utilities/mpistubs.c:994
#3 0x562c87 in HYPRE_IJMatrixCreate
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/3rd_party/hypre/hypre/src/IJ_mv/HYPRE_IJMatrix.c:115
#4 0x52aaaa in fem_assembly
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/core/experimental/fem_amg_preco.c:409
#5 0x52c1ea in fem_amg_setup_
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/core/experimental/fem_amg_preco.c:93
#6 0x437393 in prinit_
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/core/drive2.f:1801
#7 0x42f0b0 in nek_init_
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/core/drive1.f:116
#8 0x405c73 in nekton
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/core/drive.f:7
#9 0x405c73 in main
|\\\\at /home/bsc/bsc021712/Trunk-NEK-19/Nek5000_RANS/core/drive.f:11

[victorapm]

@kumarvrai this seems to be an issue with your environment. Could you provide full instructions to reproduce your problem?