Memory leaks when Room.connect(url: String, token: String, connectOptions: ConnectOptions? = nil, roomOptions: RoomOptions? = nil)

[henry-castalk]

Steps to Reproduce

Here is how I connect and disconnect a room

1. Declare the liveKitRoom: Room variable, a method connectToLiveKitRoom() to connect and a method teardownLiveKitRoom() to cleanup after disconnect.
2. After got the liveStreamUrl?.absoluteString and liveKitRoomToken, I processed the connectToLiveKitRoom() method, and surely call teardownLiveKitRoom() after leaving the screen.
3. The leaks show in the Instrument screen. According to the stacktrace, the leaks cause at this block of code

   static func createPeerConnection(_ configuration: LKRTCConfiguration,
                                    constraints: LKRTCMediaConstraints) -> LKRTCPeerConnection?
   {
       DispatchQueue.liveKitWebRTC.sync { peerConnectionFactory.peerConnection(with: configuration,
                                                                               constraints: constraints,
                                                                               delegate: nil) }
   }

Here is my code

private let liveKitRoom: Room = {
    let adaptiveStream = true
    let roomOptions = RoomOptions(adaptiveStream: adaptiveStream)
    let room = Room(roomOptions: roomOptions)
    return room
}()

private func connectToLiveKitRoom() {
    Task { [weak self] in
        guard let self else { return }
        try await liveKitRoom.connect(
            url: liveStreamUrl?.absoluteString ?? "",
            token: liveKitRoomToken ?? ""
        )
    }
}

private func teardownLiveKitRoom() {
    liveKitRoom.remove(delegate: self)
    Task { [liveKitRoom] in
        await Self.mute(liveKitRoom: liveKitRoom)
        await liveKitRoom.disconnect()
    }
}

SDK Version 2.0.5 I tried to upgrade the library from 2.0.5 to 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.0.10 but the leaks still happen.

iOS/macOS Version 17.5.1

Xcode Version

• Xcode: Version 15.4 (15F31d)
• Swift

  xcrun swift -version
  swift-driver version: 1.90.11.1 Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4)
  Target: arm64-apple-macosx14.0

Expected behavior Leaks doesn't happen

[hiroshihorie]

Thanks for the detailed report. That block of code doesn't seem to retain code, it could be leaking at WebRTC level.

[henry-castalk]

@hiroshihorie Thanks man. Do you have any suggestion about what I should do to resolve this case?