[MPI] Endless loop when using ExplicitTriangulation in 2D about ttk HOT 4 OPEN

I've been able to reproduce this issue. The infinite loop occurs when exchanging global edge identifiers between neighbors to label edges "belonging to" ghost cells. The iterCond (here the lambda defined at ExplicitTriangulation.cpp:1254) checks that all edges are labeled (global identifiers can come from neighbors of neighbors). An infinite loop might mean that some edges cannot be labeled with a global identifier.

from ttk.

Hi all,

I've discussed this problem with @julien-tierny.
Currently, this algorithm isn't really useful: it is done so that if the global identifiers for vertices and cells are produced independently of the number of processes, then the global identifiers of intermediary simplices will also be produced independently.
However, at the moment, the global identifiers of vertices and cells are not created independently of the number of processes.
This begs two questions:

• Should we keep this algorithm or create a simpler one?
• Should we try and make the global identifier generation of vertices and cells independent of the number of processes?
  Julien was leaning more towards the second, but the decision isn't set in stone just yet.

from ttk.

@eve-le-guillou can I close this issue? (it looks like this discussion is outdated)

from ttk.

The discussion is indeed outdated, however the original bug of this issue is still present (I just tested it on my machine).

from ttk.