Crash on deleting realm after migrating to 4.1.1 from 3.3.1

We are using below code to to open realm instance. It used to work fine for version 3.1.1 Idea is that we have some migrations for last two three versions but for version before that we dont so it throws exception or in case migration fails we delete that current realm and open again.

this used to work fine in 3.1.1 how ever we just upgraded to 4.1.1 last sprint and after it we are seeing a-lot of crashes.

            Realm.init(context);
            RealmConfiguration configuration = new RealmConfiguration.Builder()
                    .schemaVersion(<version>)
                    .migration(<migrator>)
                    .build();

            try {
                defaultInstance = Realm.getInstance(configuration );
            } catch (IllegalArgumentException | IllegalStateException | RealmMigrationNeededException ex) {
                Realm.deleteRealm(configuration);
                defaultInstance = Realm.getInstance(configuration);
            }

Expected Results

it should not crash

Actual Results

This is the exception we are getting

Caused by java.lang.IllegalStateException: It's not allowed to delete the file associated with an open Realm. Remember to close() all the instances of the Realm before deleting its file: /data/data/com.x.x/files/default.realm
       at io.realm.Realm.io.realm.BaseRealm.deleteRealm(SourceFile:14624)
       at com.x.x.x.RealmManager.getDefaultInstance(SourceFile:52)

Version of Realm and tooling

Realm version(s): 4.1.1

Realm sync feature enabled: yes/no

Android Studio version: 3.0.0

Which Android version and device: no specific version happening on almost every os

[cmelchior]

I just tried to write the following unit test:

    @Test
    public void deleteRealm_afterMigrationFailed() {
        RealmConfiguration config = configFactory.createConfigurationBuilder()
                .assetFile("default0.realm")
                .build();

        // First open Realm in dynamic mode to ensure that it is copied to disk
        DynamicRealm.getInstance(config).close();

        try {
            // Then attempt to open Realm normally which should throw
            Realm.getInstance(config);
            fail();
        } catch (RealmMigrationNeededException e) {
            assertTrue(Realm.deleteRealm(config));
        }
    }

It parses. Have you tried printing the values of Realm.getGlobalInstanceCount(config) as the first thing in your try/catch?

[RemyTabardel]

in 4.2.1, no date at the moment, i’m waiting for that too =p https://github.com/realm/realm-java/blob/master/CHANGELOG.md