ConnectionResetError: [Errno 104] Connection reset by peer

Hi, everybody! I use torando+aioredis, and recently i met this issue, below is traceback my environ: aioredis==1.2.0 tornado==5.1.1 I use this method aioredis.create_redis_pool(**args) to create pool can anybody show me help? thx a lot.

`Traceback (most recent call last):
   File "/usr/local/lib/python3.6/site-packages/tornado/web.py", line 1699, in _execute
 result = await result
 File "/views/notice.py", line 341, in get
   items, page_size, total_page, total_size = await Notice.cache_or_api_list(notice_id_list, page_count, page_size)
 File "models/notice.py", line 136, in cache_or_api_list
   items = await cls.query_list(page_list)
 File "models/notice.py", line 92, in query_list
   items = await asyncio.gather(*[Notice.cache_or_api(notice_id) for notice_id in notice_id_list])
 File "models/notice.py", line 37, in cache_or_api
   info = await redis.execute('get', redis_key)
 File "models/notice.py", line 37, in cache_or_api
   info = await redis.execute('get', redis_key)
 File "models/notice.py", line 37, in cache_or_api
   info = await redis.execute('get', redis_key)
 [Previous line repeated 11 more times]
 File "/usr/local/lib/python3.6/site-packages/aioredis/connection.py", line 183, in _read_data
   obj = await self._reader.readobj()
 File "/usr/local/lib/python3.6/site-packages/aioredis/stream.py", line 94, in readobj
   await self._wait_for_data('readobj')
 File "/usr/local/lib/python3.6/asyncio/streams.py", line 464, in _wait_for_data
   yield from self._waiter
 File "/usr/local/lib/python3.6/asyncio/selector_events.py", line 723, in _read_ready
   data = self._sock.recv(self.max_size)
ConnectionResetError: [Errno 104] Connection reset by peer`

[Enchufa2]

Were you able to reproduce the error? If not, I think we should focus on that first. 😃 You need to find a way to reset or abort a TCP connection in macOS, or otherwise, test this into a Linux box, where you can use ss, which aborts the connection. AFAIK, there’s no equivalent in macOS. But there’s the tcpkill utility, from dsniff, which seems to work on macOS too (at least this fork).

I just tried tcpkill myself on Linux and works nicely by resetting the connection (exactly the same issue I’ve found in production). There are two things you need to do for this to work. First, launch tcpkill:

$ sudo tcpkill -i lo port 6379

Here tcpkill keeps listening the loopback interface and will reset any TCP connection to port 6379 (if your Redis host is not local, then just change the interface accordingly). And secondly, you need to force an IPv4 connection (because tcpkill doesn’t understand IPv6). Again for localhost, you just need to specify redis = Redis(host="127.0.0.1") in my test case above.

[steve-marmalade]

Now that Aioredis is in redis-py 4.2.0rc1, is the expectation that this issue will go away once we migrate to redis? Any idea when a non-rc version will be released? Thanks for all your hard work!