io.objectbox.exception.FileCorruptException: Could not get from cursor (corrupted) (error code -30796)

In my Pre-launch report details I see continuously crashes on Android 8.1 phones. I cannot reproduce it on a Emulator with SDK 27. Stacktrace error (see for log details below): io.objectbox.exception.FileCorruptException: Could not get from cursor (corrupted) (error code -30796)

Is this a issue with pre-launch testing or might this occur on real devices as well? After searching I found multiple issues with Android 8.1. Any clue?

I'm using a read-only box from a fragment (write box is in a remote service).

• ObjectBox version 2.8.0 (but also on 2.7.1)
• Reproducibility: always on Android 8.1 devices for pre-launch report
• Device: e.g. Motorola moto e5 play and Nokia Nokia 1
• OS: Android 8.1

Code
Initialization done in MainActivity class after being connected to Service (remote process). The method initMainActivity is called.

protected void initMainActivity() {
        if (!mInitMainActivity) {
            JepsterManager jepsterManager = (JepsterManager) getApplication();
            jepsterManager.initReadOnlyBox();
            //Check if version is updated and update information has to be shown
            JepsterVersionUtilities.checkVersion(this, mService, mPreferences);
            //Check version to verify if preference migration is needed
            PrefsMigrationUtilities.checkVersion(this, mPreferences);

            setNavigationHeader();

            mInitMainActivity = true;

            //ObjectBox need to be available, JepsterService has to be started first to be able to update schema of Box.
            if (mOnPostResume){
                selectDrawerItem(mMenuItemId);
            }
        }
    }

public class ObjectBox {
    private static BoxStore boxStore;
    private static int messageId = 0;

    public static void init(Context context) {
        if (boxStore == null) {
            boxStore = MyObjectBox.builder()
                    .androidContext(context.getApplicationContext())
                    .androidReLinker(ReLinker.log(new ReLinker.Logger() {
                        @Override
                        public void log(String message) {
                            Log.d(Constants.TAG, message);
                        }
                    }))
                    .build();

            if (BuildConfig.DEBUG) {
                boolean started = new AndroidObjectBrowser(boxStore).start(context);
            }
        }
    }

    public static void initReadOnly(Context context) {
        if (boxStore == null) {
            boxStore = MyObjectBox.builder()
                    .androidContext(context.getApplicationContext())
                    .androidReLinker(ReLinker.log(new ReLinker.Logger() {
                        @Override
                        public void log(String message) {
                            Log.d(Constants.TAG, message);
                        }
                    }))
                    .readOnly()
                    .build();

            if (BuildConfig.DEBUG) {
                boolean started = new AndroidObjectBrowser(boxStore).start(context);
            }
        }
    }

    public static BoxStore get() {
        return boxStore;
    }


    public static int getMessageId(){
        messageId ++;
        return messageId;
    }
}

public int getDataFieldValue(int bike, int page, int dataField){
        Box<BikeDataFieldEntity> bikeDataFieldBox = getBikeDataFieldBox();

        //Search data field ID
        QueryBuilder<BikeDataFieldEntity> builder = bikeDataFieldBox.query();
        builder.equal(BikeDataFieldEntity_.bike, bike)
                .equal(BikeDataFieldEntity_.page, page)
                .equal(BikeDataFieldEntity_.dataField, dataField);
        Query<BikeDataFieldEntity> query = builder.build();
        BikeDataFieldEntity bikeDataField = query.findFirst(); (**Line 321**)

        return bikeDataField.getDataFieldValue();
    }

public Box<BikeDataFieldEntity> getBikeDataFieldBox(){
        if (mBikeDataFieldBox == null){
            mBikeDataFieldBox = ObjectBox.get().boxFor(BikeDataFieldEntity.class);
        }
        return mBikeDataFieldBox;
    }

Logs, stack traces

io.objectbox.exception.FileCorruptException: Could not get from cursor (corrupted) (error code -30796)
	at io.objectbox.query.Query.nativeFindFirst(Native Method)
	at io.objectbox.query.Query.lambda$findFirst$0$Query(Query.java:153)
	at io.objectbox.query.-$$Lambda$Query$U3Pw2NlOHcqDE3imeFDwfgwkeJw.call(Unknown Source:2)
	at io.objectbox.BoxStore.callInReadTx(BoxStore.java:813)
	at io.objectbox.BoxStore.callInReadTxWithRetry(BoxStore.java:759)
	at io.objectbox.query.Query.callInReadTx(Query.java:275)
	at io.objectbox.query.Query.findFirst(Query.java:151)
	at com.twom.bico.pages.FragmentPageDataFields.getDataFieldValue(FragmentPageDataFields.java:321)
	at com.twom.bico.pages.FragmentPageDataFields.initViews(FragmentPageDataFields.java:111)
	at com.twom.bico.pages.FragmentPage9DataFields.onCreateView(FragmentPage9DataFields.java:31)
	at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2698)
	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:320)
	at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1187)
	at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1356)
	at androidx.fragment.app.FragmentManager.moveFragmentToExpectedState(FragmentManager.java:1434)
	at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1497)
	at androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:447)
	at androidx.fragment.app.FragmentManager.executeOps(FragmentManager.java:2169)
	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1992)
	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1947)
	at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1818)
	at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:303)
	at androidx.fragment.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:270)

Inizia dallo stack trace alla riga 321 di FragmentPageDataFields.java e confronta l’inizializzazione in sola lettura in ObjectBox.initReadOnly con la configurazione del servizio remoto. Riproduci la query su dispositivi Android 8.1 o nell’ambiente di pre-lancio usando i dettagli del dispositivo e i log forniti. Il lavoro è completato quando è stato stabilito se la corruzione è limitata ai test di pre-lancio o può verificarsi su dispositivi reali, con una causa documentata o il passaggio diagnostico successivo.