当websocket服务器'；s的以太网电缆已拔下

我正在Android 8中使用Ktor 1.2.5和Kotlin 1.3.61开发网络应用程序

当手动关闭netty websocket服务器的wifi（或手动拔下以太网电缆）时，即使发送了某些信息，也不会在相反的websocket客户端中发生任何事件或异常。这意味着websocket客户端不知道会话丢失

相反，当websocket客户端的wifi关闭时，Web服务器可以捕获它，因为closedException:ClosedSendChannelException在发送内容时发生

当服务器的网络断开连接时，websocket客户端是否有办法知道“会话丢失”？ （当webserver的网络断开连接时，websocket客户端甚至无法正常关闭——换句话说，无法调用最后一个块-

这是代码

-----------------------------------------------------------------
 SERVER
-----------------------------------------------------------------
embeddedServer(Netty, port = 8080) {
    install(DefaultHeaders)
    install(CallLogging)
    install(WebSockets) {
        pingPeriod = Duration.ofSeconds(10)
        timeout = Duration.ofSeconds(5)
    }
    ...

    routing {
        webSocket("/test") { 
            try {
                incoming.consumeEach { frame ->
                    if(frame is Frame.Text) {
                        Log.d("test", frame.readText())
                    }
                }
            } finally {
                val reason: CloseReason? = closeReason.await()
                Log.d("test", reason.toString())
            }
        }
    }
}


private suspend fun sendSomething(data:String) {
    try {
        clients.send(Frame.Binary(true, data))
    }
    catch (closedException: ClosedSendChannelException) {
        Log.d("test", "Server ClosedSendChannelException is happened")
    }
}

-----------------------------------------------------------------
 CLIENT
-----------------------------------------------------------------
CoroutineScope(Dispatchers.IO).launch {
    try {
        client.ws(host = ip, port = 8080, path = "/test") {
            pingIntervalMillis = 1000*10
            timeoutMillis = 1000*5

            ...

            try {
                incoming.consumeEach { frame ->
                    if(frame is Frame.Text) {
                        Log.d("test", frame.readText())
                    }
                }
            } catch (e: ClosedReceiveChannelException) {
                Log.d("test", "ClosedSendChannelException is happened")
            } catch (e: Throwable) {
                Log.d("test", "ClosedSendChannelException is happened")
            } finally {
// This block cannot be called even websocket client run explicitly disconnect function, when webserver's Ethernet cable is unplugged. 
                val reason: CloseReason? = closeReason.await()
                Log.d("test", reason.toString())
            }
        }
    } catch (e: Exception) {
        if (e is NoRouteToHostException || e is ConnectException) {
            Log.d("test", "Exception")
        } else if (e.javaClass.`package`?.name.toString().startsWith("java.net")) {
            Log.d("test", "java.net")
        } else {
            Log.d("test", "unknown")
        }
    }
}

private suspend fun sendSomething(data:String) {
    try {
        clients.send(Frame.Binary(true, data))
    }
    catch (closedException: ClosedSendChannelException) {
        Log.d("test", "Client ClosedSendChannelException is happened")
    }
}