CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null)

Question

I got this error every time that I install the app on Simulator using Xcode 6

2014-09-27 11:25:01.286 MyFace[2992:1780149] CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///Users/douglasferreira/Library/Developer/CoreSimulator/Devices/DAC1BEDE-8673-471C-ADFD-923654C78719/data/Containers/Data/Application/D2213EE4-3807-44FF-9FD0-E7C6C1BD18A2/Library/MyFace.sqlite options:{
NSInferMappingModelAutomaticallyOption = 1;
NSMigratePersistentStoresAutomaticallyOption = 1;
} ... returned error Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t    be completed. (Cocoa error 512.)" UserInfo=0x7fe566317030 {reason=File appeared during sanity check; this seems suspicious} with userInfo dictionary {
reason = "File appeared during sanity check; this seems suspicious";
}

[2014-09-27 11:25:01:288] [ERROR] Problems to initialize persistent store coordinator: Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed. (Cocoa error 512.)" UserInfo=0x7fe566317030 {reason=File appeared during sanity check; this seems suspicious}, The operation couldn’t be completed. (Cocoa error 512.)

This is how I create NSManagedObjectModel and NSPersistentStoreCoordinator

- (NSManagedObjectModel *)managedObjectModel
{
    if (!_managedObjectModel)
    {
        // It is created from the application's model with the following name and extension
        NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"MyFace" withExtension:@"momd"];
        _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
    }
    return _managedObjectModel;
}

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
    if (!_persistentStoreCoordinator)
    {
        // generic variable to hold any error occurred during context creation
        NSError *error = nil;

        NSDictionary *persistentOptions = @{NSMigratePersistentStoresAutomaticallyOption:@YES, NSInferMappingModelAutomaticallyOption:@YES};

        // Create the coordinator with the previous parameters
        NSURL *storeURL = [[[NSFileManager defaultManager] URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask] lastObject];
        storeURL = [storeURL URLByAppendingPathComponent:@"MyFace.sqlite"];

        // try to initialize persistent store coordinator with options defined below
        self.persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:self.managedObjectModel];
        [self.persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
                                                      configuration:nil
                                                                URL:storeURL
                                                            options:persistentOptions
                                                              error:&error];

        if (error)
        {
            NSLog(@"[ERROR] Problems to initialize persistent store coordinator: %@, %@", error, [error localizedDescription]);
        }
    }
    return _persistentStoreCoordinator;
}

I've tried every kind of flags.. but I don't know how to get over it.

Thanks!

Answer 1

I found the solution to my problem. I had two threads accessing the NSPersistentStoreCoordinator while it's was not created yet. So I added a @synchronize on the lazy init and queued the requests.

Answer 2

I had the same problem in Swift 4, Thanks to @Douglas for the solution

What i did was adding objc_sync_enter and objc_sync_exit between the persistentStoreCoordinator.

Example:

 lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = {

        objc_sync_enter(self)

        let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
            let url = self.applicationDocumentsDirectory.appendingPathComponent("moduleName.sqlite")
            var failureReason = "There was an error creating or loading the application's saved data."
            do {
                try coordinator.addPersistentStore(ofType: NSSQLiteStoreType, configurationName: nil, at: url, options: [NSMigratePersistentStoresAutomaticallyOption: true, NSInferMappingModelAutomaticallyOption: true]) // maybe change after pre - production
            } catch {
                // Report any error we got.
                var dict = [String: AnyObject]()
                dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data" as AnyObject
                dict[NSLocalizedFailureReasonErrorKey] = failureReason as AnyObject
                dict[NSUnderlyingErrorKey] = error as NSError
                let wrappedError = NSError(domain: "ERROR_DOMAIN", code: 9999, userInfo: dict)

                #if DEBUG
                NSLog("Unresolved error \(wrappedError), \(wrappedError.userInfo)")
                #endif
                abort()
            }

        objc_sync_exit(self)

        return coordinator
    }()