App is crashing - NullPointerException com.transistorsoft.locationmanager.geofence.TSGeofenceManager in startMonitoringPolygone

[jakub-oone]

Hello Chris,

we got the error "Attempt to invoke virtual method 'java.lang.String com.transistorsoft.locationmanager.geofence.TSGeofence.getIdentifier()' on a null object reference"

Stack trace:
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.transistorsoft.locationmanager.geofence.TSGeofence.getIdentifier()' on a null object reference

at com.transistorsoft.locationmanager.geofence.TSGeofenceManager.startMonitoringPolygon
at com.transistorsoft.locationmanager.geofence.TSGeofenceManager.start
at com.transistorsoft.locationmanager.service.TrackingService.start
at com.transistorsoft.locationmanager.adapter.BackgroundGeolocation$z0.run
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)

We have tried to investigate this issue on our end. We tried to add corrupted/invalid/empty/undefined/null... geofences in BackgroundGeolocation.addGeofences method, but we were not able to reproduce this error in debug build.

Could you please look at this in the native code? We would really appreciate it. Or what do you suggest to do on our end? Do you have some idea?

Your Environment

• Plugin version: 4.17.1
• Platform: Android
• OS version: Android 11 and 14
• Device manufacturer / model: Pixel 7a (AP2A.240905.003)
• React Native version (react-native -v): 0.73.7
• Plugin config

const state:State = await BackgroundGeolocation.ready({
     desiredAccuracy: BackgroundGeolocation.DESIRED_ACCURACY_MEDIUM,
    distanceFilter: 20,
    reset: true,
    debug: false,
    stopOnTerminate: false,
    stopOnStationary: false,
    startOnBoot: true,
    enableHeadless: true,
    maxDaysToPersist: 2,
    geofenceProximityRadius: 50000,
    geofenceInitialTriggerEntry: true,
    preventSuspend: true,
    disableLocationAuthorizationAlert: true,
    locationAuthorizationRequest: 'Always',
    useSignificantChangesOnly: false,
    geofenceModeHighAccuracy: false,
    logLevel: BackgroundGeolocation.LOG_LEVEL_VERBOSE,
    });

Expected Behavior

App is not crashing after startMonitoringPolygone is called

Actual Behavior

App is crashing on some devices after startMonitoringPolygone is called

Steps to Reproduce

1. Add some valid geofences to BackgroundGeolocation.addGeofences(geofences)
2. Start monitore polygone
3. App crash

Context

We have tried to investigate this issue on our end. We tried to add corrupted/invalid/empty/undefined/null... geofences in BackgroundGeolocation.addGeofences method, but we were not able to reproduce this error in debug build.
Our geofences look like this:

{
   identifier: `tour_${activeTourRouteInterface.id}`,
   notifyOnEntry: true,
   notifyOnExit: true,
   notifyOnDwell: true,
   vertices: [
     [50.064842285635024, 14.411941808263784],
     [50.06480937893958, 14.41194482235038],
     [50.064721379239934, 14.411954828724795],
     [50.064551304826175, 14.41198433993442],
   ],
   extras: {
      kind: TOUR_GEOFENCE,
      id: activeTourRouteInterface.id,
   },
}

Debug logs

Logs

PASTE_YOUR_LOGS_HERE

[christocracy]

It seems that a Geofence has been removed from the database but the plugin still contains a reference to its identifier in a list of monitoredPolygons.

I will add a null check for this case.

[jakub-oone]

Perfect, when can we expect that update with fix? We had to halt the release.
Thank you!

[christocracy]

v4.17.2 is released.