File I/O issues during load balancing

[FoamScience]

Some custom BCs, trying to read case dictionaries in their constructors:

Foam::BCType::BCType
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const dictionary& dict
)
{
/// Here try to read transportProperties for example <-
}

Observed behavior

The reading is not reliable, at least with a custom solver that is a variant of one of GeoChemFoam solvers.

Expected behavior

File I/O should be not be affected by the load balancer.

Discussion

I can see the load balancer invalidating the this->db() or iF.mesh() as databases to register the IOdictionary to; but if it's the case; OpenFOAM should fail. Current behavior (OF2312) is to silently give a bad (and empty) IOdictionary on some processors, while the reading succeeds on some other processors.

[FoamScience]

    {
        IFstream inputFile(iF.time().globalPath()/"constant/transportProperties");
        dictionary transportProperties(inputFile);
    }

for now, mesh-unrelated I/O is a work workaround...