Address using https serviceUrl for connecting to Pulsar cluster

[lhotari]

The current Pulsar client supports a https serviceUrl for connecting to a Pulsar cluster.

Decide whether this is supported for scalable topics.

Another detail that comes into mind here is how to handle cases where there are mixed version Pulsar clusters where some brokers can handle scalable topics and some not. Would it be useful to have more metadata in the broker discovery to filter out brokers that cannot handle scalable topics at all?

[merlimat]

Decide whether this is supported for scalable topics.

No need to support. Client should just use pulsar:// urls.

Another detail that comes into mind here is how to handle cases where there are mixed version Pulsar clusters where some brokers can handle scalable topics and some not

I wouldn't worry too much. It should just be a temporary condition. Users shouldn't attempt to start using scalable topics while the cluster is still upgrading,

[lhotari]

Closing since http serviceUrl won't be supported for V5 client.

[merlimat]

I think we should make sure to give clear error message when user passes http url