Error while processing request on Azure

Question

I have an app connected with Azure backend. I created a login and some api calls 2 months ago. They worked fine until a few days ago and then it starts to fail "sometimes".
The login log onFailure says: Error while authenticating user
The callback log onFailure says: Error while processing request
And the cause of both says : stream was reset: PROTOCOL_ERROR

This post is to similar to this but didn't work.
Some code here:

LoginFragment.java

    private void login(String email, String password){

    loginProgressBar.setVisibility(View.VISIBLE);

    try {

        JsonObject params = new JsonObject();
        params.addProperty("Username", email);
        params.addProperty("Password", password);
        ListenableFuture<MobileServiceUser> listenable = Client.logIn(getContext(), params);

        Futures.addCallback(listenable, new FutureCallback<MobileServiceUser>() {
            @Override
            public void onSuccess(MobileServiceUser mobileServiceUser) {
                loginProgressBar.setVisibility(View.GONE);

                SharedPreferences settings = getActivity().getSharedPreferences(Client.MS_USER,0);
                SharedPreferences.Editor editor = settings.edit();
                Client.clientId = mobileServiceUser.getUserId();
                Client.token = mobileServiceUser.getAuthenticationToken();
                editor.putString(Client.MS_USER_ID, Client.clientId);
                editor.putString(Client.MS_AUTH_TOKEN, Client.token);
                editor.apply();

                Client.getInstance(getContext()).setCurrentUser(mobileServiceUser);

                Intent i = new Intent(getContext(), MainActivity.class);
                startActivity(i);
            }

            @Override
            public void onFailure(Throwable t) {
                loginProgressBar.setVisibility(View.GONE);
                Throwable t2 = t.getCause();
                Throwable t3 = t2.getCause();
                Log.e("LoginFail", t.getMessage());
                Log.e("LoginFail", t2.getMessage());
                if(t3 != null){
                    Log.e("LoginFail", t3.getMessage());
                }
                Toast.makeText(getContext(), getResources().getString(R.string.bad_login), Toast.LENGTH_LONG).show();

            }
        }, MoreExecutors.directExecutor());
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }
}

Client.java

public class Client {
public static final String MS_USER = "MS_USER";
public static final String MS_USER_ID = "MS_USER_ID";
public static final String MS_AUTH_TOKEN = "MS_AUTH_TOKEN";

public static String clientId;
public static String token;



private static MobileServiceClient instance = null;



public static MobileServiceClient getInstance(Context context) {

    if (instance ==null){
        try {
            instance = new MobileServiceClient(Env.AZURE_URL, context);
            instance.setAndroidHttpClientFactory(() -> {
                OkHttpClient client = new OkHttpClient();
                client.setReadTimeout(20, TimeUnit.SECONDS);
                client.setWriteTimeout(20, TimeUnit.SECONDS);
                return client;
            });
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }

   } else{
        instance.setContext(context);
    }
    return instance;
}

public static ListenableFuture<MobileServiceUser> logIn(Context context, JsonObject parameters) throws MalformedURLException {
    String deviceID = "gcm:" + Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);

    parameters.addProperty("device_id", deviceID);
    parameters.addProperty("device_dateTime", Env.DATE_FORMAT.format(new Date()));
    parameters.addProperty("device_timeZone", API.getTimezone());
    parameters.addProperty("device_language", Env.LANGUAGE);
    parameters.addProperty("app", Env.APP_NAME);

    return getInstance(context).login("auth", parameters);
}

public static  ListenableFuture<JsonElement> callApi(Context context, String apiName, JsonObject parameters, String httpMethod){

    if(httpMethod.equals("POST")){
        String deviceID = "gcm:" + Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);

        parameters.addProperty("user_id", Client.clientId);
        parameters.addProperty("device_id", deviceID);
        parameters.addProperty("device_dateTime", Env.DATE_FORMAT.format(new Date()));
        parameters.addProperty("device_timeZone", API.getTimezone());
        parameters.addProperty("device_language", Env.LANGUAGE);
        parameters.addProperty("app", Env.APP_NAME);
        parameters.addProperty("role", "Patient");
        return getInstance(context).invokeApi(apiName, parameters, httpMethod, null);
    } else {
        return getInstance(context).invokeApi(apiName, null, httpMethod, null);
    }

}

Answer 1

This is probably related to an issue in Azure App Service that is weirdly enough not reported on the public Azure status page.

The message that affected Azure client received was (quoted from the link above):

Starting at 02:00 UTC on 3 Apr 2018, you have been identified as a customer using App Services who may have received connection failure notifications when using Android apps with older HTTP clients or desktop browsers using cross-site scripting calls. Engineers have identified an issue with a recent deployment and are investigating mitigation options. Customers experiencing this issue can self-mitigate by updating the site config setting "http20Enabled" to false via resources.azure.com. Instructions on how to update site config can be found here: https://azure.microsoft.com/en-us/blog/azure-resource-explorer-a-new-tool-to-discover-the-azure-api/

Go to https://resources.azure.com/

Make sure you are in Read/Write mode by clicking in the option to the left of your name.

Find the affected site and browse to Config > Web: https://resources.azure.com/subscriptions//resourceGroups//providers/Microsoft.Web/sites//config/web

Change the property: "http20Enabled": from true to false by clicking in Edit properties, Update to “false” and then clicking PUT to save change.

If you have tried these steps and are continuing to experience issues with your App Service, please create a technical support ticket to further troubleshoot: aka.ms/azsupt. This message will be closed in 7 days.