Traceback (most recent call last):
  File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/api_core/grpc_helpers.py", line 57, in error_remapped_callable
    return callable_(*args, **kwargs)
  File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/grpc/_channel.py", line 826, in __call__
    return _end_unary_response_blocking(state, call, False, None)
  File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/grpc/_channel.py", line 729, in _end_unary_response_blocking
    raise _InactiveRpcError(state)
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
	status = StatusCode.UNKNOWN
	details = "Stream removed"
	debug_error_string = "{"created":"@1597310036.464644547","description":"Error received from peer ipv4:74.125.142.95:443","file":"src/core/lib/surface/call.cc","file_line":1061,"grpc_message":"Stream removed","grpc_status":2}"
>
The above exception was the direct cause of the following exception:
Traceback (most recent call last):

File "/workspace/dataflow/flex-templates/streaming_beam/streaming_beam_test.py", line 56, in subscription_path

subscriber.delete_subscription(subscription_path)

File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/cloud/pubsub_v1/_gapic.py", line 40, in 

fx = lambda self, *a, **kw: wrapped_fx(self.api, *a, **kw)  # noqa

File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/cloud/pubsub_v1/gapic/subscriber_client.py", line 745, in delete_subscription

request, retry=retry, timeout=timeout, metadata=metadata

File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/api_core/gapic_v1/method.py", line 145, in call

return wrapped_func(*args, **kwargs)

File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/api_core/retry.py", line 286, in retry_wrapped_func

on_error=on_error,

File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/api_core/retry.py", line 184, in retry_target

return target()

File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/api_core/timeout.py", line 214, in func_with_timeout

return func(*args, **kwargs)

File "/workspace/dataflow/flex-templates/streaming_beam/.nox/py-3-6/lib/python3.6/site-packages/google/api_core/grpc_helpers.py", line 59, in error_remapped_callable

six.raise_from(exceptions.from_grpc_error(exc), exc)

File "", line 3, in raise_from

google.api_core.exceptions.Unknown: None Stream removed