rasa.core.lock_store.LockError: Could not acquire lock for conversation_id

 2020-06-16T11:10:57.397296888Z rasa.core.lock_store.LockError: Could not acquire lock for conversation_id 'arjunnewfd-180-4'.
2020-06-16T11:10:57.397869808Z 2020-06-16 11:10:57 ERROR    rasa.core.channels.channel  - An exception occured while handling user message 'hi'.
2020-06-16T11:10:57.397909109Z Traceback (most recent call last):
2020-06-16T11:10:57.397921409Z   File "/usr/local/lib/python3.6/dist-packages/rasa/core/channels/channel.py", line 487, in receive
2020-06-16T11:10:57.397930610Z     metadata=metadata,
2020-06-16T11:10:57.397939510Z   File "/usr/local/lib/python3.6/dist-packages/rasa/core/channels/channel.py", line 83, in handler
2020-06-16T11:10:57.397948510Z     await app.agent.handle_message(*args, **kwargs)
2020-06-16T11:10:57.397957411Z   File "/usr/local/lib/python3.6/dist-packages/rasa/core/agent.py", line 485, in handle_message
2020-06-16T11:10:57.397966411Z     async with self.lock_store.lock(message.sender_id):
2020-06-16T11:10:57.397975011Z   File "/usr/local/lib/python3.6/dist-packages/async_generator/_util.py", line 34, in __aenter__
2020-06-16T11:10:57.397983712Z     return await self._agen.asend(None)
2020-06-16T11:10:57.397992012Z   File "/usr/local/lib/python3.6/dist-packages/rasa/core/lock_store.py", line 93, in lock
2020-06-16T11:10:57.398000612Z     conversation_id, ticket, wait_time_in_seconds
2020-06-16T11:10:57.398009012Z   File "/usr/local/lib/python3.6/dist-packages/rasa/core/lock_store.py", line 125, in _acquire_lock
2020-06-16T11:10:57.398017713Z     f"Could not acquire lock for conversation_id '{conversation_id}'."
2020-06-16T11:10:57.398026213Z rasa.core.lock_store.LockError: Could not acquire lock for conversation_id 'arjunnewfd-180-4'.
2020-06-16T11:10:57.398751838Z 2020-06-16 11:10:57 ERROR    rasa.core.channels.channel  - An exception occured while handling user message 'hi'.

will this fix with make timeout for rasa shell configurable by wochinge · Pull Request #5686 · RasaHQ/rasa · GitHub

version 1.9.7 by increasing readout timer

Hi, I am also getting the exactly same error as yours, please can you confirm what worked in your case.