Timeout for server request made using "Volley" only on Android not iOS

In one of my application, I am sending request to server using volley provided by Google.

Problem : Timeout and error object is null on onErrorResponse(VolleyError error)

What i have tried so far :

1) First I got null error object so solved it by using below code :

 @Override
            protected void deliverResponse(String response) {
                super.deliverResponse(response);
            }

            @Override
            public void deliverError(VolleyError error) {
                super.deliverError(error);
                DebugLog.e("deliverResponse", "getNetworkTimeMs : " + error.getNetworkTimeMs());
            }

So far I have got that there is timeout happening when I got error object null.

2) Now Application is for Android and iOS and web but timeout happens only for Android.

Volley log for requests :

BasicNetwork.logSlowRequests: HTTP response for request

Note :

1. Web services develoed at server end is same for all three instances (Android , Web and iOS).

2. Timeout happens when too many users makes requests to the server.

References I have been gone through :

Optimizing Volley

http://ift.tt/1S0HJMf

Edited :

I have also set retry plolicy as below:

request.setRetryPolicy(new DefaultRetryPolicy(DefaultRetryPolicy.DEFAULT_TIMEOUT_MS * 48,
                0, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

And also i do not want to retry if connection timeout.

How can i make efficient service call that can solve problem for timeout.

Any help will be appriciated.

Thanks.