contrib/python/pytest/py3/_pytest/threadexception.py:77: PytestUnhandledThreadExceptionWarning: Exception in thread Thread-20 (stop_node)

Traceback (most recent call last):
  File "contrib/tools/python3/Lib/threading.py", line 1075, in _bootstrap_inner
    self.run()
  File "contrib/tools/python3/Lib/threading.py", line 1012, in run
    self._target(*self._args, **self._kwargs)
  File "ydb/tests/library/harness/kikimr_runner.py", line 661, in stop_node
    exception = self.__stop_node(node, kill)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "ydb/tests/library/harness/kikimr_runner.py", line 647, in __stop_node
    node.stop()
  File "ydb/tests/library/harness/kikimr_runner.py", line 274, in stop
    super(KiKiMRNode, self).stop()
  File "ydb/tests/library/harness/daemon.py", line 194, in stop
    if not self.__check_can_launch_stop("stop"):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "ydb/tests/library/harness/daemon.py", line 170, in __check_can_launch_stop
    self.__close_output_files()
  File "ydb/tests/library/harness/daemon.py", line 94, in __close_output_files
    self.__stdout_file.close()
    ^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'close'

