Server does not stop sending `Observe` `NON` notifications after receiving RFC 7252 `RST`

[carl-tud]

See title

class TimeResource(resource.ObservableResource):
    """Example resource that can be observed. The `notify` method keeps
    scheduling itself, and calles `update_state` to trigger sending
    notifications."""

    def __init__(self):
        super().__init__()

        self.handle = None

    def notify(self):
        self.updated_state()
        self.reschedule()

    def reschedule(self):
        self.handle = asyncio.get_event_loop().call_later(5, self.notify)

    def update_observation_count(self, count):
        if count and self.handle is None:
            print("Starting the clock")
            self.reschedule()
        if count == 0 and self.handle:
            print("Stopping the clock")
            self.handle.cancel()
            self.handle = None

    async def render_get(self, request):
        payload = datetime.datetime.now().strftime("%Y-%m-%d %H:%M").encode("ascii")
        return aiocoap.Message(payload=payload)

works with CONs:

Observe=1 in replicated req works tho:

[carl-tud]

Or do I have to enable this somewhere?

[chrysn]

No, this is a bug; an RST should unconditionally go to and cancel the observation(-s?) that last sent to that remote. (Probably with that MID, will have to check the spec).