worker_server1.release();
  worker_server0.release();
}

// This test verifies the following:
// 1. Start the GRPC servers for both worker 0 and 1 using the full cluster
//    server def A.
// 2. Create a context B using the full cluster server def A.
// 3. Create the variable in B.
// 4. Create a context C using a single host server def D with only worker 1.
// 5. Read the variable in C.

  TF_SessionOptions* opt = TF_NewSessionOptions();
  TF_Status* s = TF_NewStatus();
  const char* tags[] = {tensorflow::kSavedModelTagServe};
  TF_Graph* graph = TF_NewGraph();
  // NULL run_options and meta_graph_def should work.
  TF_Session* session = TF_LoadSessionFromSavedModel(
      opt, nullptr, saved_model_dir.c_str(), tags, 1, graph, nullptr, s);
  EXPECT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);