Reconnect to room on a Relay Server

Greg Moulds

Also Alessio, can you confirm whether your lobby type has the "Allow join in progress" Rule enabled or disabled? That's also relevant. Thanks!

Alessio Falsetti

Hi Paul & Greg,

player B re-authenticates, so I assume that his "cx" changes. Is it possible to ensure that the player can re-enter the room even by re-authenticating? If you have a unique passcode, could you use that?
"Allow join in progress" is true

Regarding the number of rooms, so in practice you can have a maximum of 2500 simultaneous rooms (50 "Max servers" x 50 "Containers per Server"), right?

Thank you!

Paul Winterhalder

Hi Alessio,

I think we've identified your test app and lobby. We believe that both

Disband at Start

Allow join in progress

are enabled for that lobby. Unfortunately - they shouldn't be - this is a regression in Portal-X - it should be disallowing that combo.

So what we believe is happening is player B is re-authenticating before attempting to re-connect.

Because Player B now has a new session, he/she also has a new connection id (i.e. cx) - and the Relay Server seems them as a new person.

Because "Allow Join in Progress" is enabled - the Relay Server attempts to contact the lobby to see if this user is valid - but that lobby doesn't exist anymore - and we get the error you are seeing... (which is maybe not the best error message).

Disabling "Allow join in progress" will result in a more understandable error message - but probably won't fix the problem.

The real trick to this scenario would be for the network re-connect to the room server to happen without recreating the CX - but depending upon the type of network failure that is probably unavoidable.

The devs are looking into options.

Paul.

Alessio Falsetti

Thanks Paul, I really appreciate it.
Bear in mind that the player could also disconnect due to a crash or the mobile device being turned off, so the possibility of re-entering the room even after having performed a new authentication would be very very important.

Please let me know!

Alessio

Paul Winterhalder

Also Alessio,

Agreed with your scenario - we are prioritizing a improvement to deal with that scenario for you.

Also that maximum # of servers is a limit that we can control per-app - so we can bump that up.

Paul.

Alessio Falsetti

Hi @Paul-Winterhalder, any chance to have new developments regarding reconnection in the room?

Paul Winterhalder

Hi @Alessio-Falsetti - checking with the devs.

I believe we have a short-term Relay Server patch that makes reconnecting generally more reliable -- but also a change for 5.2 that can allow reconnecting across sessions... (that will be an option for the dev to enable).

5.2 is currently targeting mid-to-late February for release.

Alessio Falsetti

Great! Happy to hear that!

Alessio Falsetti

Ciao @Paul-Winterhalder, @Greg-Moulds,
I have updated BC to 5.2, so I can implement the rejoin in the room. But it's not clear to me how to implement it. The only information I found is in the release notes where it only says this:

Reconnects - Relay Servers now better handling reconnect scenarios. There is also an option to allow reconnects even if the user’s session has changed ("ALLOW_REJOIN_BY_PROFILE_ID": "true").

How does it work?

Thanks!

Greg Moulds

Hey @Alessio-Falsetti . In order to enable that feature, you need to update the "Custom Environment" settings for the appropriate "My Servers" definition:

Alessio Falsetti

Hi @Greg-Moulds ,
ok, I've updated the custom environment of my server, and now? If I try to rejoin the room, I receive alway this error:
"status":403,"reason_code":90300,"status_message":"Server Closed Connection","severity":"ERROR"}.

I'm using:
RelayService.Connect(RelayConnectionType.TCP, connectionOptions, null, failureCallback);

What should I do?
Thanks!

Greg Moulds

Hmm... Let me poke around.

Greg Moulds

So a question for you... are you able to connect initially and it's failing on the reconnect? Or are you failing to connect at all?

Greg Moulds

I'm assuming from your statement "if I try to rejoin the room" that you've connected successfully initially.

Alessio Falsetti

Yes, works well first time.

Alessio Falsetti

However, reconnection doesn't work.

Greg Moulds

Ok thanks @Alessio-Falsetti . We're still looking into it so I'll let you know when we have an update.

Greg Moulds

@Alessio-Falsetti Next question... what are your "Disband on start" and "Allow join in progress" settings for this lobby type?

Greg Moulds

Ok @Alessio-Falsetti ,
I'm 99% sure I know what's going wrong. Correct me if I'm wrong but your lobby type configuration has both "Disband on start" and "Allow join in progress" set to true.
This was a bug in our portal that existed up until the recent 5.2 release. Now, you cannot set both those values to true. The portal (neither portal-X nor the legacy portal) will not allow you to do this.
All that said, your lobby type configuration was obviously created before we fixed this so your lobby configuration is in a bad state and you need to choose one or the other.
I don't know enough about your use-case to say which you should choose but if you want to ask for some guidance, let us know and we can take a closer look at your requirements and figure it out.
For now, you can just do a quick test by turning one of "Disband on start" or "Allow join in progress" off and re-run your test.
Let us know how it turns out!

Alessio Falsetti

Ciao @Greg-Moulds,
yes, you are right... I had both "Disband on start" and "Allow join in progress". I removed "Allow join in progress" and now the re-connection works normally. I'll do some more testing, but this seems to have solved the problem!
I'll let you know if I discover anything else!

Thanks a lot!