Cannot call AsyncToSync twice in one sync context for channels_redis

I am using a SyncConsumer which adds itself to a group on websocket.connect with group_add method of channel_layer.

class TaskConsumer(JsonWebsocketConsumer):
    def connect(self):
        self.accept()
        AsyncToSync(self.channel_layer.group_add)('task-i-1', self.channel_name)

    def task_message(self, event):
        self.send_json(event["text"])

If I try to send message to this group using group_send method that is wrapped with AsyncToSync, first message is succeed but further messages throw this exception:

>>> c = get_channel_layer() >>> AsyncToSync(c.group_send)('task-i-1', {'type': 'task.message', 'text':{}}) >>> AsyncToSync(c.group_send)('task-i-1', {'type': 'task.message', 'text':{}}) Connection <RedisConnection [db:0]> has pending commands, closing it. Traceback (most recent call last): File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/channel s_redis/core.py”, line 316, in group_send await connection.zremrangebyscore(key, min=0, max=int(time.time()) - self.group_expiry) RuntimeError: Task <Task pending coro=<AsyncToSync.main_wrap() running at /home/ahmet/webso cket_channel/env/lib64/python3.6/site-packages/asgiref/sync.py:57> cb=[_run_until_complete_cb() at /usr/lib64/python3.6/asyncio/base_events.py:176]> got Future <Future pe nding> attached to a different loop

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File “<console>”, line 1, in <module> File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/asgiref /sync.py”, line 49, in call call_result.result() File “/usr/lib64/python3.6/concurrent/futures/_base.py”, line 425, in result return self.__get_result() File “/usr/lib64/python3.6/concurrent/futures/_base.py”, line 384, in __get_result raise self._exception File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/asgiref /sync.py”, line 57, in main_wrap result = await self.awaitable(*args, **kwargs) File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/channel s_redis/core.py”, line 320, in group_send await connection.zrange(key, 0, -1) File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/aioredi s/commands/init.py”, line 152, in exit self._release_callback(conn) File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/aioredi s/pool.py”, line 361, in release conn.close() File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/aioredi s/connection.py”, line 352, in close self._do_close(ConnectionForcedCloseError()) File “/home/ahmet/websocket_channel/env/lib64/python3.6/site-packages/aioredi s/connection.py”, line 359, in _do_close self._writer.transport.close() File “/usr/lib64/python3.6/asyncio/selector_events.py”, line 621, in close self._loop.call_soon(self._call_connection_lost, None) File “/usr/lib64/python3.6/asyncio/base_events.py”, line 574, in call_soon self._check_closed() File “/usr/lib64/python3.6/asyncio/base_events.py”, line 357, in _check_closed raise RuntimeError(‘Event loop is closed’) RuntimeError: Event loop is closed

• OpenSuse Leap(42.2)
• python[3.6.4], django[2.0.2], channels[2.0.0], daphne[2.0.2], channels-redis[2.0.2]. asgiref[2.1.3]
• Django running with runserver

[Elabbasy00]

shell asgiref==3.5.2 channels==4.0.0 channels-redis==4.0.0

Task exception was never retrieved
future: <Task finished name='Task-378' coro=<Connection.disconnect() done, defined at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:819> exception=RuntimeError("Task <Task pending name='Task-378' coro=<Connection.disconnect() running at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:831>> got Future <Future pending> attached to a different loop")>
Traceback (most recent call last):
  File "/home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py", line 831, in disconnect
    await self._writer.wait_closed()  # type: ignore[union-attr]
  File "/usr/lib/python3.10/asyncio/streams.py", line 344, in wait_closed
    await self._protocol._get_close_waiter(self)
RuntimeError: Task <Task pending name='Task-378' coro=<Connection.disconnect() running at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:831>> got Future <Future pending> attached to a different loop
Task exception was never retrieved
future: <Task finished name='Task-381' coro=<Connection.disconnect() done, defined at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:819> exception=RuntimeError("Task <Task pending name='Task-381' coro=<Connection.disconnect() running at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:831>> got Future <Future pending> attached to a different loop")>
Traceback (most recent call last):
  File "/home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py", line 831, in disconnect
    await self._writer.wait_closed()  # type: ignore[union-attr]
  File "/usr/lib/python3.10/asyncio/streams.py", line 344, in wait_closed
    await self._protocol._get_close_waiter(self)
RuntimeError: Task <Task pending name='Task-381' coro=<Connection.disconnect() running at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:831>> got Future <Future pending> attached to a different loop
Task exception was never retrieved
future: <Task finished name='Task-382' coro=<Connection.disconnect() done, defined at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:819> exception=RuntimeError("Task <Task pending name='Task-382' coro=<Connection.disconnect() running at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:831>> got Future <Future pending> attached to a different loop")>
Traceback (most recent call last):
  File "/home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py", line 831, in disconnect
    await self._writer.wait_closed()  # type: ignore[union-attr]
  File "/usr/lib/python3.10/asyncio/streams.py", line 344, in wait_closed
    await self._protocol._get_close_waiter(self)
RuntimeError: Task <Task pending name='Task-382' coro=<Connection.disconnect() running at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:831>> got Future <Future pending> attached to a different loop

sometimes I got

Task exception was never retrieved
future: <Task finished name='Task-348' coro=<Connection.disconnect() done, defined at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:819> exception=RuntimeError('Event loop is closed')>
Traceback (most recent call last):
  File "/home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py", line 828, in disconnect
    self._writer.close()  # type: ignore[union-attr]
  File "/usr/lib/python3.10/asyncio/streams.py", line 338, in close
    return self._transport.close()
  File "/usr/lib/python3.10/asyncio/selector_events.py", line 698, in close
    self._loop.call_soon(self._call_connection_lost, None)
  File "/usr/lib/python3.10/asyncio/base_events.py", line 750, in call_soon
    self._check_closed()
  File "/usr/lib/python3.10/asyncio/base_events.py", line 515, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed
Task exception was never retrieved
future: <Task finished name='Task-349' coro=<Connection.disconnect() done, defined at /home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py:819> exception=RuntimeError('Event loop is closed')>
Traceback (most recent call last):
  File "/home/elabbasy/Desktop/BOT_TOOL/webserver/server/venv/lib/python3.10/site-packages/redis/asyncio/connection.py", line 828, in disconnect
    self._writer.close()  # type: ignore[union-attr]
  File "/usr/lib/python3.10/asyncio/streams.py", line 338, in close
    return self._transport.close()
  File "/usr/lib/python3.10/asyncio/selector_events.py", line 698, in close
    self._loop.call_soon(self._call_connection_lost, None)
  File "/usr/lib/python3.10/asyncio/base_events.py", line 750, in call_soon
    self._check_closed()
  File "/usr/lib/python3.10/asyncio/base_events.py", line 515, in _check_closed
    raise RuntimeError('Event loop is closed')
RuntimeError: Event loop is closed

[ahaltindis]

No, still same exception. I used same block code for consumer and triggered in a same way. It always gets failed in the second time. Traceback

I am using this workaround for now instead of AsyncToSync. I am not sure if it is suitable for every case or elegant solution.

loop = asyncio.get_event_loop()
coroutine = channel_layer.group_send(
    group_name,
    {
        'type': 'task.message',
        'text': context
    })
loop.run_until_complete(coroutine)