ssl.SSLError: [SSL: APPLICATION_DATA_AFTER_CLOSE_NOTIFY] application data after close notify (_ssl.c:2696)

[khteh]

Occasionally the app throws the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.12/multiprocessing/process.py", line 314, in _bootstrap
    self.run()
  File "/usr/lib/python3.12/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/home/khteh/.local/share/virtualenvs/PythonRestAPI-6TwrpjXm/lib/python3.12/site-packages/hypercorn/asyncio/run.py", line 196, in asyncio_worker
    _run(
  File "/home/khteh/.local/share/virtualenvs/PythonRestAPI-6TwrpjXm/lib/python3.12/site-packages/hypercorn/asyncio/run.py", line 234, in _run
    runner.run(main(shutdown_trigger=shutdown_trigger))
  File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/base_events.py", line 687, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/futures.py", line 203, in result
    raise self._exception.with_traceback(self._exception_tb)
  File "/usr/lib/python3.12/asyncio/tasks.py", line 314, in __step_run_and_handle_result
    result = coro.send(None)
             ^^^^^^^^^^^^^^^
  File "/home/khteh/.local/share/virtualenvs/PythonRestAPI-6TwrpjXm/lib/python3.12/site-packages/hypercorn/asyncio/run.py", line 171, in worker_serve
    await asyncio.wait_for(gathered_server_tasks, config.graceful_timeout)
  File "/usr/lib/python3.12/asyncio/tasks.py", line 520, in wait_for
    return await fut
           ^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/tasks.py", line 385, in __wakeup
    future.result()
  File "/usr/lib/python3.12/asyncio/tasks.py", line 316, in __step_run_and_handle_result
    result = coro.throw(exc)
             ^^^^^^^^^^^^^^^
  File "/home/khteh/.local/share/virtualenvs/PythonRestAPI-6TwrpjXm/lib/python3.12/site-packages/hypercorn/asyncio/run.py", line 110, in _server_callback
    await TCPServer(app, loop, config, context, lifespan_state, reader, writer)
  File "/home/khteh/.local/share/virtualenvs/PythonRestAPI-6TwrpjXm/lib/python3.12/site-packages/hypercorn/asyncio/tcp_server.py", line 76, in run
    await self._close()
  File "/home/khteh/.local/share/virtualenvs/PythonRestAPI-6TwrpjXm/lib/python3.12/site-packages/hypercorn/asyncio/tcp_server.py", line 119, in _close
    await self.writer.wait_closed()
  File "/usr/lib/python3.12/asyncio/streams.py", line 364, in wait_closed
    await self._protocol._get_close_waiter(self)
  File "/usr/lib/python3.12/asyncio/futures.py", line 294, in __await__
    return self.result()  # May raise too.
           ^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/futures.py", line 203, in result
    raise self._exception.with_traceback(self._exception_tb)
  File "/usr/lib/python3.12/asyncio/sslproto.py", line 648, in _do_shutdown
    self._sslobj.unwrap()
  File "/usr/lib/python3.12/ssl.py", line 920, in unwrap
    return self._sslobj.shutdown()
           ^^^^^^^^^^^^^^^^^^^^^^^
ssl.SSLError: [SSL: APPLICATION_DATA_AFTER_CLOSE_NOTIFY] application data after close notify (_ssl.c:2696)