putReservoir success, getReservoir failure about reservoir HOT 10 CLOSED

11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ java.lang.NullPointerException
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at com.anupcowkur.reservoir.Reservoir$GetTask.doInBackground(Reservoir.java:180)
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at com.anupcowkur.reservoir.Reservoir$GetTask.doInBackground(Reservoir.java:163)
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at android.os.AsyncTask$2.call(AsyncTask.java:287)
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at java.util.concurrent.FutureTask.run(FutureTask.java:234)
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
11-16 09:15:57.436    1292-1292/com.myapp W/System.err﹕ at java.lang.Thread.run(Thread.java:841)

        Reservoir.putAsync(key, apiResponse, new ReservoirPutCallback() {
                @Override
                public void onSuccess() {
                    Log.i("RestCache", "[PUT] Success: " + key);
                }

                @Override
                public void onFailure(Exception e) {
                    Log.i("RestCache", "[PUT] Failed: " + key);
                }
        });

        Reservoir.getAsync(this.key, ApiResponse.class, new ReservoirGetCallback<ApiResponse>() {
                @Override
                public void onSuccess(ApiResponse apiResponse) {
                    Log.i("RestCache", "[GET] Success: " + key);
                    try {
                        Log.i("RestCache", "Using cached data...");
                        callback.apiSuccess(tag, apiResponse, null, null);
                    } catch (JSONException e) {
                        Log.i("RestCache", "Using cached data failed!");
                        e.printStackTrace();
                    }
                }

                @Override
                public void onFailure(Exception e) {
                     Log.i("RestCache", "[GET] Failed: " + key);
                     Log.i("RestCache", "Requesting new data...");
                     //some process here...
                }
        });

{
    "data":
    [
        {
            "movieid": 14920,
            "title": "Everly"
            "rating": "R-16",
            "poster": "http://ia.media-imdb.com/images/M/MV5BMjEyNTU4NTE5NV5BMl5BanBnXkFtZTgwNzY4NzIxNDE@._V1_SX214_AL_.jpg",
            "url": "http://www.imdb.com/title/tt1945084/",
            "release_date": "2015-02-11",
            "genre": "Action, Thriller",
            "critics_rating": 
                {
                    "title": "‘Everly’ Lacks the Imagination to Make Up for its Minor Ambitions",
                    "articleid": 25056,
                    "rating": 1.5,
                    "rating_img": "http://icons.iconarchive.com/icons/oxygen-icons.org/oxygen/32/Actions-rating-icon.png"
                }
        }
    ],
    "message": "",
    "status": true,
    "total": 22
}