Python-slack-sdk: Getting "Sessions is closed" for example for RTM

[sushiparlour]

Description

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What type of issue is this? (place an x in one of the [ ])

• [ ] bug
• [ ] enhancement (feature request)
• [ ] question
• [x] documentation related
• [ ] testing related
• [ ] discussion

Requirements (place an x in each of the [ ])

• [ ] I've read and understood the Contributing guidelines and have done my best effort to follow them.
• [ ] I've read and agree to the Code of Conduct.
• [ ] I've searched for any related issues and avoided creating a duplicate issue.

---

Bug Report

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Reproducible in:

slackclient version:
2.3.0
python version:
3.6
OS version(s):
MacOS Catalina 10.15

Steps to reproduce:

1. Copy and pasted example from documentation
2. Ran

(Also tested my token which works with webclient)

Expected result:

Was expecting for it to run so I can send the bot a test message but crashes immediately.

Actual result:

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/Users/chamho/Google Drive/Python Projects/um-slack_bot/test.py", line 23, in <module>
    rtmclient.start()
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/slack/rtm/client.py", line 198, in start
    return self._event_loop.run_until_complete(future)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/asyncio/base_events.py", line 467, in run_until_complete
    return future.result()
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/slack/rtm/client.py", line 334, in _connect_and_read
    proxy=self.proxy,
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/aiohttp/client.py", line 1012, in __aenter__
    self._resp = await self._coro
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/aiohttp/client.py", line 728, in _ws_connect
    proxy_headers=proxy_headers)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/aiohttp/client.py", line 357, in _request
    raise RuntimeError('Session is closed')
RuntimeError: Session is closed

Attachments:

Logs, screenshots, screencast, sample project, funny gif, etc.

[RodneyU215]

Thanks for writing in about this @sushiparlour. I've just released an update to address this bug in v2.3.1. Please update and let me know if it still occurs.

[donosoivan]

Mi aplicacion funcionaba y tuve el mismo error luego de actualizar el modulo slackclient2.3.0 , se corrigio instalando la version 2.3.1

[prashantRR1st]

Mi aplicacion funcionaba y tuve el mismo error luego de actualizar el modulo slackclient2.3.0 , se corrigio instalando la version 2.3.1

Tried updating to slackclient 2.3.1. Now 'python3 app.py' does nothing. Loads indefinitely.

[seratch]

I think you mentioned this document: https://slack.dev/python-slackclient/real_time_messaging.html#connecting-to-the-rtm-api

If so, it works at least for me. If you're still interested in checking this issue, could you try the latest version with the following code?

import os
# pip install slackclient==2.5.0
from slack import RTMClient


@RTMClient.run_on(event="message")
def say_hello(**payload):
    data = payload['data']
    web_client = payload['web_client']

    if 'text' in data and 'Hello' in data['text']: # see https://github.com/slackapi/python-slackclient/pull/646
        channel_id = data['channel']
        thread_ts = data['ts']
        user = data['user']

        web_client.chat_postMessage(
            channel=channel_id,
            text=f"Hi <@{user}>!",
            thread_ts=thread_ts
        )


slack_token = os.environ["SLACK_API_TOKEN"]
rtm_client = RTMClient(token=slack_token)
rtm_client.start()

Adding the following lines may be helpful to figure out what is happening to your app.

import sys
print(sys.version)
import logging
logging.basicConfig(level=logging.DEBUG)

$ python app.py 
3.6.10 (default, Mar 14 2020, 13:40:31) 
[GCC 4.2.1 Compatible Apple LLVM 11.0.0 (clang-1100.0.33.8)]
DEBUG:asyncio:Using selector: KqueueSelector
DEBUG:slack.rtm.client:Retrieving websocket info.
DEBUG:slack.web.slack_response:Received the following response: {'ok': True, 'url': 'wss://xxx.lb.slack-msgs.com/websocket/random-random', 'team': {'id': 'T123', 'name': 'workspace', 'domain': 'your-domain'}, 'self': {'id': 'U123', 'name': 'rtm-bot'}}
DEBUG:slack.rtm.client:The Websocket connection has been opened.

[seratch]

Allow me to close this issue as the team doesn't have any further actions to take on this. However, if you have something further to ask/discuss here, please feel free to reopen this.