Android: notification is not come (+ crash happened) when app process is killed

[AliakseiZhukouski]

1. Is the bug present in the demo Chat SDK project?
   dependencies are:
   sdk.chat:firebase-app:5.4.2"
   sdk.chat:pro-firebase-last-online:5.4.2"

2. What modifications have you made to the Chat SDK?

3. Android Version:
   Android 10 (API 29)

4. Steps taken to reproduce the problem:

1. create thread 1 by 1 (using user firebase id)
2. user 1 being in foreground from UI (chat details) send message to thread
3. user 2 being in background (app process was intentionally killed by swiping up from recent) does not get any notification and from time to time get crash (in 50% of cases) - crash output is below

6. Expected result:
   Application being in background (when process was killed swiping up from recents) should get notification

7. Actual result:
   Application is not get any notification and sometimes can even crashes (being in background and killed as process).
   In the logcat output we can see the next crash
   03-18 19:37:39.418 E/AndroidRuntime( 4883): java.lang.RuntimeException: Unable to start receiver sdk.chat.core.push.DefaultBroadcastReceiver: java.lang.NullPointerException: Attempt to invoke virtual method 'org.greenrobot.greendao.query.QueryBuilder sdk.chat.core.dao.DaoSession.queryBuilder(java.lang.Class)' on a null object reference
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at android.app.ActivityThread.handleReceiver(ActivityThread.java:4238)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at android.app.ActivityThread.access$1700(ActivityThread.java:274)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2113)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at android.os.Handler.dispatchMessage(Handler.java:107)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at android.os.Looper.loop(Looper.java:237)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at android.app.ActivityThread.main(ActivityThread.java:8167)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at java.lang.reflect.Method.invoke(Native Method)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:496)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1100)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'org.greenrobot.greendao.query.QueryBuilder sdk.chat.core.dao.DaoSession.queryBuilder(java.lang.Class)' on a null object reference
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at sdk.chat.core.session.StorageManager.fetchEntityWithEntityID(StorageManager.java:162)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at sdk.chat.core.session.StorageManager.fetchThreadWithEntityID(StorageManager.java:209)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at sdk.chat.core.push.BaseBroadcastHandler.onReceive(BaseBroadcastHandler.java:34)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at sdk.chat.core.push.DefaultBroadcastReceiver.onReceive(DefaultBroadcastReceiver.java:18)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): at android.app.ActivityThread.handleReceiver(ActivityThread.java:4229)
   03-18 19:37:39.418 E/AndroidRuntime( 4883): ... 8 more

8. Comments:

[bensmiley]

I have investigated this and I'm not able to reproduce the issue. I would need a reliable way to reproduce it to go further.

[shjman]

you can try to add this

if (!ChatSDK.db().isDatabaseOpen) {
        val currentUserId = ChatSDK.auth().currentUserEntityID
        if (currentUserId != null) {
            try {
                ChatSDK.db().openDatabase(currentUserId)
            } catch (e: Exception) {
                Log.e...
            }
        }
    }

after a moment when you call ChatSDK.builder()... .activate(context)