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)

Commencez par la stack trace à la ligne 321 de FragmentPageDataFields.java et comparez l’initialisation en lecture seule dans ObjectBox.initReadOnly avec la configuration du service distant. Reproduisez la requête sur des appareils Android 8.1 ou dans l’environnement de pré-lancement à l’aide des détails de l’appareil et des logs fournis. Le travail est terminé lorsqu’il est établi si la corruption est limitée aux tests de pré-lancement ou peut se produire sur de vrais appareils, avec une cause documentée ou la prochaine étape de diagnostic.