question

Hi guys, we have been working with IAP on Amazon for a year now. With the latest game we release, we noticed new crashes due to null pointer exceptions in PurchaseUpdatesAsyncTask. Specifically on: protected Boolean doInBackground(final PurchaseUpdatesResponse... params) { final PurchaseUpdatesResponse purchaseUpdatesResponse = params[0]; final SharedPreferences.Editor editor = getSharedPreferencesEditor(); final String userId = baseActivity.getCurrentUser(); //it crashes here if (!purchaseUpdatesResponse.getUserId().equals(userId)) { //we do stuff to handle the purchase } it seems that sometimes purchaseUpdatesResponse is returned null. Track: java.lang.RuntimeException at android.os.AsyncTask$3.done(AsyncTask.java:300) at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) at java.util.concurrent.FutureTask.setException(FutureTask.java:222) at java.util.concurrent.FutureTask.run(FutureTask.java:242) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:841) Caused by: java.lang.NullPointerException at org.ourgame.lib.PurchaseObserver$PurchaseAsyncTask.doInBackground(PurchaseObserver.java:263) <-- If statement at org.ourgame.lib.PurchaseObserver$PurchaseAsyncTask.doInBackground(PurchaseObserver.java:1) at android.os.AsyncTask$2.call(AsyncTask.java:288) at java.util.concurrent.FutureTask.run(FutureTask.java:237) Any idea what this could be about? What scenario could lead to onPurchaseResponse to be resulting in null? We're talking about a published game, where this happened a few times. Thanks!