iOS 5 Core Data freeze

Question

I try to do the following simple thing:

NSArray * entities = [context executeFetchRequest:inFetchRequest error:&fetchError];

Nothing fancy.

Answer 1

In my case the app would freeze before 'executeFetchRequest' without any warning. The solution was to wrap all db operations in @synchronized(persistentStore). Eg:

NSArray *objects;
@synchronized([self persistentStoreCoordinator]) {
            objects = [moc executeFetchRequest:request error:&error];
}