Error after creating offer with invalid minsize argument

[theborakompanioni]

While reproducing the error described in joinmarket-webui/jam#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.