Error after creating offer with invalid `minsize` argument

[theborakompanioni]

While reproducing the error described in https://github.com/joinmarket-webui/jam/issues/740, the following exception occurs and cannot be recovered from unless daemon is restarted:

Steps to reproduce:

• Call to RPC method /wallet/{walletname}/maker/start with a minsize greater than any individual mixdepth balance.

  stdout:

  2024-04-21 05:11:17,248 [ERROR]  Failed to create offers.
  2024-04-21 05:11:17,248 [INFO]  Shutting down YieldGenerator service.

• Start again with valid minsize

• See following exception in the stderr output

  Unhandled error in Deferred:
  
  Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/twisted/internet/defer.py", line 981, in _startRunCallbacks
    self._runCallbacks()
  File "/usr/local/lib/python3.11/site-packages/twisted/internet/defer.py", line 1075, in _runCallbacks
    current.result = callback(  # type: ignore[misc]
  File "/src/src/jmbase/twisted_utils.py", line 225, in onion_listen
    return onion_endpoint.listen(self.proto_factory)
  File "/usr/local/lib/python3.11/site-packages/twisted/internet/endpoints.py", line 513, in listen
    return defer.execute(
  --- <exception caught here> ---
  File "/usr/local/lib/python3.11/site-packages/twisted/internet/defer.py", line 148, in execute
    result = callable(*args, **kwargs)
  File "/usr/local/lib/python3.11/site-packages/twisted/internet/posixbase.py", line 364, in listenTCP
    p.startListening()
  File "/usr/local/lib/python3.11/site-packages/twisted/internet/tcp.py", line 1336, in startListening
    raise CannotListenError(self.interface, self.port, le)
  twisted.internet.error.CannotListenError: Couldn't listen on 127.0.0.1:8080: [Errno 98] Address already in use.

• After a while (less than 10min as stated in the message), daemon shuts down:

  2024-04-21 05:17:15,859 [INFO]  Failed to start after 10 minutes, giving up.

Let me know if I can and should provide more details. Happy to assist in any way possible.