def _start_poll_on_thread(self):
        t = threading.Thread(target=self._polling_loop)
        t.start()
Exceptions raised in `open_port` operations are reported as
dataset/ETHPy150Open OneDrive/onedrive-sdk-python/src/onedrivesdk/async_operation_monitor.py/AsyncOperationMonitor._start_poll_on_thread--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/test/test_container.py/OpenPortsTests.test_open_port_errors_as_errbacks