OPC UA Discovery Server subscriptions

[francescobianca]

Hi,

I have my discovery server running at port 4080:

server = Server()
await server.init()
server.set_endpoint('opc.tcp://0.0.0.0:4840/freeopcua/server/')
server.application_type = ua.ApplicationType.DiscoveryServer
...

and a series of opc ua server running in other ports; All of this have these piece of code inside:

await self.server.register_to_discovery(url='opc.tcp://localhost:4840')

After this I have created a client to perform discovery operations:

servers = await client.find_servers()

The thing that is not very clear to me is that if I do:

await opcua_server.server.unregister_to_discovery(url='opc.tcp://localhost:4840')

and afterwards I call the function from the client, the servers that should have been deleted continue to appear.

Is this behavior correct? I expect that after the unregister they will disappear from the list