[petsc-users] PETSc initialization error

[Sam Guo]

To clarify, I call PETSc initialize and PETSc finalize everytime I call
SLEPc:

  PetscInitializeNoPointers(argc,args,nullptr,nullptr);

  SlepcInitialize(&argc,&args,static_cast<char*>(nullptr),help);

  //calling slepc

  SlepcFinalize();

   PetscFinalize();



On Fri, Jun 19, 2020 at 10:32 PM Sam Guo <sam.guo at cd-adapco.com> wrote:

> Dear PETSc team,
>    When I called SLEPc multiple time, I eventually got following error:
>
> MPI operation not supported by PETSc's sequential MPI wrappers
> [0]PETSC ERROR: #1 PetscInitialize() line 967 in
> ../../../petsc/src/sys/objects/pinit.c
> [0]PETSC ERROR: #2 SlepcInitialize() line 262 in
> ../../../slepc/src/sys/slepcinit.c
> [0]PETSC ERROR: #3 SlepcInitializeNoPointers() line 359 in
> ../../../slepc/src/sys/slepcinit.c
> PETSC ERROR: Logging has not been enabled.
> You might have forgotten to call PetscInitialize().
>
>   I debugged: it is because of following in petsc/src/sys/mpiuni/mpi.c
>
> if (num_attr >= MAX_ATTR)
>
> in function int MPI_Comm_create_keyval(MPI_Copy_function
> *copy_fn,MPI_Delete_function *delete_fn,int *keyval,void *extra_state)
>
> num_attr is declared static and keeps increasing every
> time MPI_Comm_create_keyval is called.
>
> I am using petsc 3.11.3 but found 3.13.2 has the same logic.
>
> Is this a bug or I didn't use it correctly?
>
> Thanks,
> Sam
>
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