When a cron job attempts to deliver a message to WeChat (Weixin), it fails with the following error: In weixin.py, the send_weixin_direct() function creates an aiohttp.ClientSession that gets reused across different event loops. When a cron job runs in a new session with a different event loop, the existing session (tied to the old loop) becomes invalid, causing the timeout context manager error. 4. Observe the error in logs

TL;DR

Create a new aiohttp.ClientSession instance when the current event loop doesn't match the session's loop to resolve the timeout context manager error.

Guidance

• Verify that the send_weixin_direct() function is indeed creating an aiohttp.ClientSession that gets reused across different event loops, causing the error.
• Implement the proposed fix by adding an event loop consistency check in send_weixin_direct() to create a new session when the current event loop doesn't match the session's loop.
• Ensure that the new session is properly closed when it's no longer needed to avoid resource leaks.
• Test the fix by reproducing the error using the provided steps and verifying that the cron job executes successfully with WeChat delivery.

Example

current_loop = asyncio.get_event_loop()
if session is None or session._loop is not current_loop:
    if session and not session.closed:
        await session.close()
    session = aiohttp.ClientSession()

Notes

This fix assumes that the aiohttp library is being used correctly and that the event loop consistency check is sufficient to resolve the issue. Additional debugging may be necessary if the problem persists.

Recommendation

Apply the proposed workaround by implementing the event loop consistency check in send_weixin_direct() to create a new session when necessary, as this directly addresses the identified root cause of the issue.