message: Fix the cluster spec propagation
diff: @@ -155,8 +155,9 @@ def main(argv):
  test_accuracy.variables)
  config = tf.ConfigProto()
  - config.cluster_def.CopyFrom(
  - cluster_resolver.cluster_spec().as_cluster_def())
  + cluster_spec = cluster_resolver.cluster_spec()
  + if cluster_spec:
  + config.cluster_def.CopyFrom(cluster_spec.as_cluster_def())
  with tf.Session(cluster_resolver.master(), config=config) as session:
  session.run([v.initializer for v in all_variables])
  