Error in 'RenameBoundaryGenerator' when the 'new_boundary_id' is large

[echo1115]

Hi all,
When using mesh-only to run the case of moose/test/tests/meshgenerators/rename_boundary_generator/name_and_id.i , I changed the old_boundary and new_boundary to old_boundary_id and new_boundary_id in the object [rename_both_id_and_name] :

  [rename_both_id_and_name]
    type = RenameBoundaryGenerator
    input = ed0
    old_boundary_id = '100' 
    new_boundary_id = '40000' #'20000' #'101'
  []

when the new_boundary_id is 101 or 20000, the mesh was created successfully,
but when setting it to 40000, it failed with the message:

Error writing sidesets
[0] ../src/mesh/exodusII_io_helper.C, line 2697, compiled Apr 13 2022 at 21:08:08

*** ERROR ***
Error writing sidesets

application called MPI_Abort(MPI_COMM_WORLD, 1) - process 0

in the https://github.com/libMesh/libmesh/blob/devel/src/mesh/exodusII_io_helper.C, I find the error message but I don't understand：

      ex_err = exII::ex_put_sets(ex_id, side_boundary_ids.size(), sets.data());
      EX_CHECK_ERR(ex_err, "Error writing sidesets");

I hope your help, thanks!

[GiudGiud]

Hello

In libmesh you may find the integer type for boundary ids

50 #if LIBMESH_BOUNDARY_ID_BYTES == 1
  [ 51](https://libmesh.github.io/doxygen/namespacelibMesh.html#a3f4d8a52b5ef6ff6156ca209e12b5564) typedef int8_t [boundary_id_type](https://libmesh.github.io/doxygen/namespacelibMesh.html#a3f4d8a52b5ef6ff6156ca209e12b5564);
   52 #elif LIBMESH_BOUNDARY_ID_BYTES == 4
   53 typedef int32_t [boundary_id_type](https://libmesh.github.io/doxygen/namespacelibMesh.html#a3f4d8a52b5ef6ff6156ca209e12b5564);
   54 #elif LIBMESH_BOUNDARY_ID_BYTES == 8
   55 typedef int64_t [boundary_id_type](https://libmesh.github.io/doxygen/namespacelibMesh.html#a3f4d8a52b5ef6ff6156ca209e12b5564);
   56 #else // LIBMESH_BOUNDARY_ID_BYTES = 2 (default)
   57 typedef int16_t [boundary_id_type](https://libmesh.github.io/doxygen/namespacelibMesh.html#a3f4d8a52b5ef6ff6156ca209e12b5564);
   58 #endif

you can see that the defaut is an int16. The biggest int16 is 32767 so that's your problem.

We should probably catch this in MOOSE before trying to write a file though

Guillaume

[GiudGiud]

I ll raise an issue about this once I've narrowed it down to where it's failing.

Thank you for reporting this

[GiudGiud]

btw new_boundary_id is deprecated. Please avoid using that. new_boundary will set the id and the name when using a number

[echo1115]

Thanks for your reply! @GiudGiud . If I want to use an int32 or bigger one, how should I set in MOOSE?

[GiudGiud]

You would need to build libmesh from source to do that, and modify it in libmesh.

[echo1115]

thanks for your suggestion. @GiudGiud