[MOAB-dev] pcomm::exchange_tags unpredicted behaviour on large mesh

[Kanaev A.A.]

Hello, MOAB-dev,

I have  10205296 hexa and  30736714 quads in my mesh
I read the mesh on 64 processors and exchange 1 layer of ghost cells with additional 2d entities
Then i exchange GLOBAL_ID tag data for quads
After exchange it looks like all quads have received new GLOBAL_ID tag value, it doesn't appear on smaller meshes
And there're two different quads with GLOBAL_ID = 30718357 on 41 proc after exchange (i think there're more doubles, that's just what i've spotted)

Small test program attached

The mesh is 3.9Gb, i hope that link works
https://drive.google.com/file/d/0B6upEZeL2DFWXzhYZjEzNGlQem8/view

Please check that on 64 processors

Anton
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