Как правильно отправить get запрос в kotlin

Есть сервер на локальной машине(spring):

@RestController
public class RestApiController {
    DBHandler dbHandler = new DBHandler();


    @RequestMapping(
            value = "/add",
            method = RequestMethod.GET,
            produces = MediaType.APPLICATION_JSON_VALUE
    )
    public UUID restMethod(String name) throws SQLException {
        UUID id = UUID.randomUUID();
        return id;
    }
}

Он доступен в браузере по соответствующей ссылке (http://localhost:8080/add)

В котлине пытаюсь отправить get запрос:

internal class AsyncRequest : AsyncTask<String, Int, String>() {
        override fun doInBackground(vararg p0: String?): String {
            val mURL = URL("http://localhost:8080" + p0[0])

            with(mURL.openConnection() as HttpURLConnection) {
                // optional default is GET
                requestMethod = "GET"

                println("URL : $url")
                println("Response Code : $responseCode")

                BufferedReader(InputStreamReader(inputStream)).use {
                    val response = StringBuffer()

                    var inputLine = it.readLine()
                    while (inputLine != null) {
                        response.append(inputLine)
                        inputLine = it.readLine()
                    }
                    it.close()
                    println("Response : $response")
                }
            }
            return "";
        }
    }

При обращении получаю ошибку:

I/System.out: URL : http://localhost:8080/add
E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
    Process: com.example.logapp, PID: 13461
    java.lang.RuntimeException: An error occurred while executing doInBackground()
        at android.os.AsyncTask$4.done(AsyncTask.java:415)
        at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
        at java.util.concurrent.FutureTask.run(FutureTask.java:271)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:923)
     Caused by: java.net.ConnectException: Failed to connect to localhost/127.0.0.1:8080
        at com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:147)
        at com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:116)
        at com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:186)
        at com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:128)
        at com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:97)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:289)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:232)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:465)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:411)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:542)
        at com.example.logapp.MainActivity$AsyncRequest.doInBackground(MainActivity.kt:40)
        at com.example.logapp.MainActivity$AsyncRequest.doInBackground(MainActivity.kt:31)
        at android.os.AsyncTask$3.call(AsyncTask.java:394)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:923) 

В чем может быть проблема ? Заранее спасибо