Gamelift Health Check Issue With Unreal Engine 5

I am currently working on Unreal Engine 5.1.1 game project. I have integrated GameLiftServerSDK in to our game as we want to use dedicated servers hosted on AWS GameLift. I have downloaded latest version of Unreal - GameLift plugin SDK (5.0.0) and fallowed latest tutorial for integration in to UE.

For testing purpose I have created simple Unreal project from Third Person Template with GameLiftServerSDK plugin. I have added code from latest integration guide: https://docs.aws.amazon.com/gamelift/latest/developerguide/integration-engines-setup-unreal.html to the GameMode class of the test project.

I have access to Amazon GameLift Console where I have setup Fleet (type Anywhere) and I have configured my desktop workstation as compute in custom location in that fleet. Before running dedicated server package, I run aws gamelift get-compute-auth-token command, and use token as parameter in executable shortcut.

Every time I try to run dedicated server (with all preparations) I get crash EXCEPTION_ACCESS_VIOLATION <CallStack>ProjectServer!OnHealthCheckInternal() ...\Plugins\GameLiftServerSDK\Source\GameLiftServerSDK\Private\GameLiftServerSDK.cpp:245]

Hi,

Amazon GameLift has added support for Unreal Engine 5, please check out the latest developer guide for instruction to integrate: https://docs.aws.amazon.com/gamelift/latest/developerguide/integration-engines-setup-unreal.html

Related: https://aws.amazon.com/about-aws/whats-new/2023/04/amazon-gamelift-unreal-engine-5/

I have found solution. Add private member variables:

FGameLiftServerSDKModule* GameLiftSdkModule;
FProcessParameters GameLiftProcessParams;
FServerParameters serverParameters;

To your YourProjectGameMode class. Do not use lambda functions for delegates OnHealthCheck, OnTerminate and onGameSession but create regular functions and bind them to delegates.

UYourProjectGameMode::UYourProjectGameMode() {
...
        GameLiftSdkModule = nullptr;
	GameLiftProcessParams.OnStartGameSession.BindUObject(this, &UYourProjectGameMode::OnGameSessionActivated);
	GameLiftProcessParams.OnUpdateGameSession.BindUObject(this, &UYourProjectGameMode::OnUpdateGameSessionReceived);
	GameLiftProcessParams.OnHealthCheck.BindUObject(this, &UYourProjectGameMode::OnHealthCheckReceived);
	GameLiftProcessParams.OnTerminate.BindUObject(this, &UYourProjectGameMode::OnTerminateServerProcess);
...
}

void UYourProjectGameMode::InitGameLift()
{
	UE_LOG(LogTemp, Log, TEXT("Initializing the GameLift Server"));

	GameLiftSdkModule = &FModuleManager::LoadModuleChecked<FGameLiftServerSDKModule>(FName("GameLiftServerSDK"));
...
}
void UYourProjectGameMode::OnGameSessionActivated(Aws::GameLift::Server::Model::GameSession ActivatedSession)
{
	// When a game session is created, GameLift sends an activation request to the game server and passes along the game session object
	// containing game properties and other settings.
	// Here is where a game server should take action based on the game session object.
	// Once the game server is ready to receive incoming player connections, it should invoke GameLiftServerAPI.ActivateGameSession()

	CurrentGameSessionId = FString(ActivatedSession.GetGameSessionId());
	UE_LOG(LogTemp, Log, TEXT("GameSession Initializing: %s"), *CurrentGameSessionId);
	if (GameLiftSdkModule != nullptr)
	{
		GameLiftSdkModule->ActivateGameSession();
	}
}

void UYourProjectGameMode::OnUpdateGameSessionReceived(Aws::GameLift::Server::Model::UpdateGameSession UpdatedSession)
{
	FString gameSessionId = FString(UpdatedSession.GetGameSession().GetGameSessionId());
	UE_LOG(LogTemp, Log, TEXT("GameSession Updated: %s"), *gameSessionId);
	//GameLiftSdkModule->ActivateGameSession();
}

bool UYourProjectGameMode::OnHealthCheckReceived()
{
	// This is the HealthCheck callback. GameLift will invoke this callback every 60 seconds or so.
	// Here, a game server might want to check the health of dependencies and such. Simply return true if healthy, false otherwise.
	// The game server has 60 seconds to respond with its health status. GameLift will default to 'false' if the game server doesn't respond in time.
	// In this case, we're always healthy!

	UE_LOG(LogTemp, Log, TEXT("Performing Health Check"));
	return true;
}

void UYourProjectGameMode::OnTerminateServerProcess()
{
	// OnProcessTerminate callback. GameLift will invoke this callback before shutting down an instance hosting this game server.
	// It gives this game server a chance to save its state, communicate with services, etc., before being shut down.
	// In this case, we simply tell GameLift we are indeed going to shutdown.

	UE_LOG(LogTemp, Log, TEXT("Game Server Process is terminating"));
	if (GameLiftSdkModule != nullptr)
	{
		GameLiftSdkModule->ProcessEnding();
	}
}