open() failed: Read-only file system in io_realm_internal_SharedGroup.cpp line 109

[simon]

Hi there,

I'm running into an exception every I change my realm schema (by adding/removing variables with getters/setters from Objects that extend RealmObject). The exception and stack trace is below:

java.lang.RuntimeException: Unspecified exception. open() failed: Read-only file system in io_realm_internal_SharedGroup.cpp line 109

            at io.realm.internal.SharedGroup.createNativeWithImplicitTransactions(Native Method)

            at io.realm.internal.SharedGroup.<init>(SharedGroup.java:57)

            at io.realm.Realm.<init>(Realm.java:143)

            at io.realm.Realm.createAndValidate(Realm.java:472)

            at io.realm.Realm.migrateRealmAtPath(Realm.java:958)

            at io.realm.Realm.migrateRealmAtPath(Realm.java:945)

My code does the following:

Realm realm;

        try {

            realm = Realm.getInstance(context, REALM_NAME);

        } catch(RealmMigrationNeededException ex) {

            Realm.migrateRealmAtPath(REALM_NAME, new RealmMigration() {

                @Override

                public long execute(Realm realm, long version) {

                    // Migrate from version 1 to 2

                    if (version == 1) {

                        Table userTable = realm.getTable(UserModel.class);

                        // adding columns

                        version++;

                    }

                    if (version == 2) {

                        Table userTable = realm.getTable(UserModel.class);

                        // adding columns

                        version++;

                    }

                    return version;

                }

            });

            realm = Realm.getInstance(context);

        }

REALM_NAME is just set to db.realm.

Is this a known issue? Am I performing migrations incorrectly? Lastly, please let me know if I can provide any more useful info to help debug this.

My build.gradle file has the line: compile 'io.realm:realm-android:0.75.1' to include realm in my project.

Thanks!

[Brian Munkholm]

Hi,
You should ensure that the REALM_NAME should be including full path to a location that is writable.

Cheers

--
Brian Munkholm

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