message: MultiProcessRunner: Disable MPR on python 3.8 + Linux case.
diff: @@ -19,6 +19,7 @@ from __future__ import division
  from __future__ import print_function
  import multiprocessing
  import os
  +import platform
  import sys
  import unittest
  from absl import app
  @@ -37,6 +38,8 @@ def _is_enabled():
  tpu_args = [arg for arg in sys.argv if arg.startswith('--tpu')]
  if is_oss() and tpu_args:
  return False
  + if sys.version_info == (3, 8) and platform.system() == 'Linux':
  + return False # TODO(b/171242147)
  return sys.platform != 'win32'
  