Bug fix for broadcasting metadata >2GB: Limit MPI_Bcast to 1GB blocks to avoid integer overflow.

        vector.resize(inputSize);

    }

    MPI_Bcast(vector.data(), static_cast<int>(inputSize), MPI_CHAR, rankSource,

              mpiComm);

    const int MAXBCASTSIZE = 1073741824;

    int blockSize = (inputSize > MAXBCASTSIZE ? MAXBCASTSIZE : inputSize);

    size_t sent = 0;

    size_t pos = 0;

    char *buffer = vector.data();

    while (inputSize > 0)

    {

        MPI_Bcast(buffer, blockSize, MPI_CHAR, rankSource, mpiComm);

        buffer += blockSize;

        inputSize -= blockSize;

        blockSize = (inputSize > MAXBCASTSIZE ? MAXBCASTSIZE : inputSize);

    }

}

// GatherArrays specializations