Android AWS Appsync subscription does not fire events

Question

AWS Appsync subscription does not fire events.I did not receive events from the socket. The watcher seems to work fine because if i pass a wrong token (for test) it fire onFailure event.

What i have done is:

Update my project gradle:

classpath 'com.amazonaws:aws-android-sdk-appsync-gradle-plugin:2.7.+'

Update my app gradle:

apply plugin: 'com.amazonaws.appsync'

and dependencies:

implementation 'com.amazonaws:aws-android-sdk-appsync:2.7.+' 
implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.0'
implementation 'org.eclipse.paho:org.eclipse.paho.android.service:1.1.1'

Put these files inside app/src/main/graphql

queries.graphql

subscription subscribeToNotify($userId: ID!, $deviceId: ID!){ subscribeToNotify(userId: $userId, deviceId: $deviceId){ userId deviceId body } }

schema.json (downloaded from console)

My configuration json is:

{
"UserAgent": "aws-amplify-cli/0.1.0",
"Version": "1.0",
"IdentityManager": {
    "Default": {}
},
"AppSync": {
    "Default": {
        "ApiUrl": "https://XXX",
        "Region": "eu-west-1",
        "AuthMode": "OPENID_CONNECT"
    },
    "Demo": {
        "ApiUrl": "https://XXX",
        "Region": "eu-west-2",
        "AuthMode": "OPENID_CONNECT"
    }
}

}

Manifest: `

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />



<service android:name="org.eclipse.paho.android.service.MqttService" />

My activity:

 private lateinit var appSyncClient : AWSAppSyncClient
    private lateinit var watcher: AppSyncSubscriptionCall<SubscribeToNotifySubscription.Data>

    private var callback:AppSyncSubscriptionCall.Callback<SubscribeToNotifySubscription.Data> = object : AppSyncSubscriptionCall.Callback<SubscribeToNotifySubscription.Data> {

        override fun onResponse(response: Response<SubscribeToNotifySubscription.Data>) {
            runOnUiThread {
                Timber.i("Subcription onResponse invoked  $response")
                Timber.e("Subcription onResponse invoked  $response")
                Timber.d("Subcription onResponse invoked  $response")
            }
        }
        override fun onCompleted() {
            Timber.i("Subcription onCompleted invoked")
        }

        override fun onFailure(e: ApolloException) {
            Timber.e("Subcription ERROR $e")
        }
    }

override fun subscribeToNotification(userID: String, deviceID: String, clearToken:String) {
        try{

            Timber.d("subscribeToNotification INVOKED")

            val clientConfiguration : AWSConfiguration =  AWSConfiguration(this)

            appSyncClient =  AWSAppSyncClient.builder().context(applicationContext).awsConfiguration(clientConfiguration).oidcAuthProvider { clearToken }.build()
            //subscribeToNotify

            var app_event_subscription = SubscribeToNotifySubscription.builder().deviceId(deviceID).userId(userID!!).build()

            watcher = appSyncClient.subscribe(app_event_subscription)
            watcher.execute(callback)

        }catch (ex:Exception){
            Timber.e("EXCEPTION CONNETING "+ex.message)
        }
    }

When the backend send me a notification nothing appear in log console but i can read that the subsription is done:

2019-04-25 10:49:28.456 12082-12317/infinite_software.intelligence_center.intelligencecenter D/RealSubscriptionManager: Subscription Infrastructure: Adding subscription object com.amazonaws.mobileconnectors.appsync.subscription.SubscriptionObject@4d109b1 to topic 156616541434/2b4hzivvqvdwzmcy4wibyy2sku/subscribeToNotify/85582f91c6e6a66749f4e0e9c4d74ea7abef52b2e4c0242517e5236d4d51be60. Total subscription objects: 1

and the scheduler that works (every X seconds):

2019-04-25 10:50:59.996 12082-12082/infinite_software.intelligence_center.intelligencecenter D/AlarmPingSender: Sending Ping at:1556185859996 2019-04-25 10:51:00.006 12082-12082/infinite_software.intelligence_center.intelligencecenter D/AlarmPingSender: Schedule next alarm at 1556185890006 2019-04-25 10:51:00.006 12082-12082/infinite_software.intelligence_center.intelligencecenter D/AlarmPingSender: Alarm scheule using setExactAndAllowWhileIdle, next: 30000 2019-04-25 10:51:00.033 12082-12350/infinite_software.intelligence_center.intelligencecenter D/AlarmPingSender: Success. Release lock(MqttService.client.dcuju2iftbdgplcvdamtlghzuu):1556185860033

I missing something ?