Get Match function contains no server details with "Enable server allocation" on

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Daniel Moniz asked May 31, '21

Get Match function contains no server details with "Enable server allocation" on

I've got a situation (all in UE4 Blueprint) where:

I have only one Matchmaking queue on which "Enable server allocation" is set
my matchmaking works as intended (I can see players are matched, the correct callbacks are fired, etc.)
I'm calling `Get Match`, which triggers the success callback
On success, I'm calling Break MultiplayerGetMatchResult
The Server Details pin in is invalid/does not exist.
A server is started. (I can see that one server moves from Standby to Active within about a minute.)
The server build is apparently healthy (tested both locally and as seen in the Servers tab of the web interface ("Deployed").

The fact that a server starts, but I apparently don't get the server details when calling GetMatch, is the odd part to me. Is there a step I'm missing? Do I need to get the match information, then somehow wait for a server to start? My impression was that enabling Server Allocation would allow for this flow.

In the below picture, note that `ReceiveMatchSuccess` at the top-left is confirmed to run. The code fails gracefully at the `Is Valid` calls on the right, which is being provided the invalid `Server Details` data.

Thanks in advance! I'd be thrilled to push this forward.

unreal

serverissue01.png (260.5 KiB)

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Answer 1 · 2021-05-31T06:47:25Z

Citrus Yan answered May 31, '21

To take a closer look at this issue, could you please print out the full response from "GetMatch" to see what's the exact response returned from PlayFab? And, may I have your title id to investigate further?

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Daniel Moniz commented · May 31, 2021 at 01:16 PM

Hi Citrus. The title id is DE791.

To add while I'm testing it again, the game is actually crashing when I check for ServerDetails. I'm assuming that given that I apparently _do_ have ServerDetails (see below), I'm unable to decode them using `DecodeGetMultiplayerServerDetailsResponseResponse`. Maybe that's the wrong way to get the server details?

It looks like the response is as follows:

LogPlayFab: Response : {"code":200,"status":"OK","data":{"MatchId":"130be327-fd5a-4a01-9585-cffdba212864","Members":[{"TeamId":"team2","Entity":{"Id":"E55B09325AA1E918","Type":"title_player_account","TypeString":"title_player_account"}},{"TeamId":"team1","Entity":{"Id":"7AA7403CA206D83F","Type":"title_player_account","TypeString":"title_player_account"}}],"RegionPreferences":["EastUs"],"ServerDetails":{"IPV4Address":"52.226.0.66","Ports":[{"Name":"game","Num":30000,"Protocol":"UDP"}],"Region":"EastUs","Fqdn":"dns0040805f-2de9-4471-a481-10a7147a7951-azurebatch-cloudservice.eastus.cloudapp.azure.com"}}}

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Citrus Yan Daniel Moniz commented · Jun 01, 2021 at 03:07 AM

The problem is that "DecodeGetMultiplayerServerDetailsResponseResponse" is not the right node to decode the server details from GetMatch because it's for decoding the response from GetMultiplayerServerDetails. ServerDetails from GetMatch is a PlayFab Json Object Object reference, you can use nodes such as "GetStringField", "GetField":

to get the fields within ServerDetails.

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get-xxx.png (16.7 KiB)

Daniel Moniz Citrus Yan commented · Jun 02, 2021 at 12:49 AM

That's it! Nothing more than needing to use the various GetField-type methods to pull IPV4Address and Ports from the ServerDetails object.

Thank you! I've since had my first successful dedicated server test.

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