message: Bug fix for broadcasting metadata >2GB: Limit MPI_Bcast to 1GB blocks to avoid integer overflow.
diff: @@ -128,8 +128,18 @@ void BroadcastVector(std::vector<char> &vector, MPI_Comm mpiComm,
  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
  