cloudkit+coredata syncing stopped, how to restore syncing?

Question

My app uses cloudkit+coredata, syncing works fine util i found recent items not appear on another iphone one day, I think the syncing stopped. so i add some debug information and error occurs:

21-12-10 16:13:58.089 CKDBManager[128], processCloudkitEventChanged(:)[c]: Event(setup) started 21-12-10 16:13:58.301 CKDBManager[133], processCloudkitEventChanged(:)[c]: Event(setup) finished in 0.21s with success 21-12-10 16:14:01.218 CKDBManager[128], processCloudkitEventChanged(:)[c]: Event(setup) started 21-12-10 16:14:01.280 CKDBManager[133], processCloudkitEventChanged(:)[c]: Event(setup) finished in 0.06s with success 21-12-10 16:14:01.286 CKDBManager[128], processCloudkitEventChanged(:)[c]: Event(import) started 21-12-10 16:14:02.372 CKDBManager[133], processCloudkitEventChanged(:)[c]: Event(import) finished in 1.09s with success 21-12-10 16:14:02.378 CKDBManager[128], processCloudkitEventChanged(:)[c]: Event(export) started 21-12-10 16:14:02.388 CKDBManager[133], processCloudkitEventChanged(:)[c]: Event(export) finished in 0.01s with success 21-12-10 16:14:12.741 CKDBManager[128], processCloudkitEventChanged(:)[c]: Event(export) started 21-12-10 16:14:12.756 CKDBManager[133], processCloudkitEventChanged(:)[c]: Event(export) finished in 0.02s with success 21-12-10 16:14:12.762 CKDBManager[128], processCloudkitEventChanged(:)[c]: Event(import) started 21-12-10 16:14:13.169 CKDBManager[131], processCloudkitEventChanged(:)[c]: Event(import) error: Error Domain=CKErrorDomain Code=12 "(null)"

first, I cannot find description of CKErrorDomain Code=12. but the most important is how can i restore syncing between coredata and cloudkit without data loss on iphone(already so many data)?

the code shows as following:

        NotificationCenter.default
        .publisher(for: NSPersistentCloudKitContainer.eventChangedNotification)
        .sink { [weak self] notification in
            guard let self = self else { return }
            self.processCloudkitEventChanged(notification)
        }
        .store(in: &subscriptions)


private func processCloudkitEventChanged(_ notification: Notification) {
    guard let cloudEvent = notification.userInfo?[NSPersistentCloudKitContainer.eventNotificationUserInfoKey]
            as? NSPersistentCloudKitContainer.Event else { return }
    
    var eventTypeString = "";
    switch cloudEvent.type {
    case .setup: eventTypeString = "setup"
    case .import: eventTypeString = "import"
    case .export: eventTypeString = "export"
    @unknown default: eventTypeString = "unknown"
    }
    
    if cloudEvent.endDate == nil {
        foolPrint("Event(\(eventTypeString)) started")
    } else {
        if let error = cloudEvent.error {
            foolPrint("Event(\(eventTypeString)) error: \(error)")
        } else {
            foolPrint("Event(\(eventTypeString)) finished in \(String(format: "%.2f", cloudEvent.endDate?.timeIntervalSince(cloudEvent.startDate) ?? 0))s with \(cloudEvent.succeeded ? "success" : "failure")")
        }
    }
}

error logs after enable system cloudkit debug info:

2021-12-10 17:34:44.041410+0800 Listening[30856:17878746] [error] error: CoreData+CloudKit: -NSCloudKitMirroringDelegate recoverFromError:: - Attempting recovery from error: defaultOwner = }>

NSCloudKitMirroringDelegate: 0x2834d40d0> - Ignoring remote change notification because it's for a different store: 2B6EC011-682C-4F95-x-910FC6ECDB81 / 2B6EC011-682C-4F95-x-910FC6ECDB81

cloudkit+coredata syncing stopped, how to restore syncing?

0 Answers