Traceback (most recent call last):


 "/home/ubuntu/stage/caldera/plugins/chain/app/chain_api.py", line 55, in rest_core

data = dict(await request.json())
TypeError: 'NoneType' object is not iterable

Traceback (most recent call last):


 "/usr/local/lib/python3.6/site-packages/aiohttp/web_protocol.py", line 418, in start

resp = await task


 "/usr/local/lib/python3.6/site-packages/aiohttp/web_app.py", line 458, in _handle

resp = await handler(request)


 "/application/faust_mod/web/drivers/aiohttp.py", line 241, in _dispatch

return await handler(request)


 "/application/faust_mod/web/views.py", line 77, in __call__

return await self.dispatch(request)


 "/application/faust_mod/web/views.py", line 93, in dispatch

response = await method(cast(Request, request), **kwargs)


 "/application/faust_mod/app/base.py", line 1252, in get

view.web, request)


 "/application/faust_mod/app/router.py", line 65, in route_req

dest_url: URL = app.router.key_store(table_name, key)


 "/application/faust_mod/app/router.py", line 30, in key_store

return self._assignor.key_store(topic, k)


 "/application/faust_mod/assignor/partition_assignor.py", line 366, in key_store

return URL(self._tps_url[self.app.producer.key_partition(topic, key)])


 "/application/faust_mod/transport/drivers/aiokafka.py", line 819, in key_partition

serialized_value=None,


 "/usr/local/lib/python3.6/site-packages/aiokafka/producer/producer.py", line 236, in _partition

all_partitions = list(self._metadata.partitions_for_topic(topic))
TypeError: 'NoneType' object is not iterable
