docstr: Replace remote host_port for a task, and run ops on cluster.
docstr_tok: ["Replace","remote","host_port","for","a","task",",","and","run","ops","on","cluster","."]
code: def testServerReplaced(self):
      """Replace remote host_port for a task, and run ops on cluster."""
      with ops.device(self.device_t1):
          x1 = array_ops.ones([2, 2])
  
      context.update_server_def(server_def=self.server_def_s1_s3)
      with ops.device(self.device_t2):
          y = math_ops.matmul(x1, x1)
      np.testing.assert_array_equal([[2, 2], [2, 2]], y.numpy())
  
imports: import os
  import threading
  from absl.testing import parameterized
  import numpy
  from tensorflow.core.distributed_runtime.preemption import gen_check_preemption_op
  from tensorflow.core.protobuf import cluster_pb2
  from tensorflow.core.protobuf import tensorflow_server_pb2
  from tensorflow.python import pywrap_tfe
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import executor
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.training import coordinator
  from tensorflow.python.training import server_lib
label_desc: Use image node_id 7 for calling the DynamicClusterTest obj's underlying member method code with example usage: obj.testServerReplaced() without return types