Realm for React Native not work offline

[mancioshell]

How frequently does the bug occur?

Always

Description

Hi, i’m using realm for a react native application.
I receive SyncError: Failed to connect to sync: Host not found (authoritative) error when turn off wifi. But i have read mongo realm is offline first…

I open realm like this:

function AuthProvider() {
  const [visible, setVisible] = useState<boolean>(false);
  const [error, setError] = useState<string>('');

  const user = useUser();
  console.log('user', user);

  const realmAccessBehavior: Realm.OpenRealmBehaviorConfiguration = {
    type: Realm.OpenRealmBehaviorType.DownloadBeforeOpen,
    timeOutBehavior: Realm.OpenRealmTimeOutBehavior.OpenLocalRealm,
    timeOut: 3000,
  };

  return (
    <RealmProvider
      schema={[
        Invoice,
        Operator,
        Customer,
        Report,
        ReportDetail,
        Manpower,
        Material,
        RightToCall,
      ]}
      sync={{
        flexible: true,
        newRealmFileBehavior: realmAccessBehavior,
        existingRealmFileBehavior: realmAccessBehavior,
        initialSubscriptions: {
          update(subs, realm) {
            subs.add(realm.objects(Invoice));
            subs.add(realm.objects(Customer));
            subs.add(realm.objects(Operator));
            subs.add(realm.objects(Report));
          },
          rerunOnOpen: true,
        },
        onError: (_session, err) => {
          console.log('error', err);
          setError(err.message);
          setVisible(true);
        },
      }}>
      <App />
      <ErrorDialog
        errorTitle="Errore di Sincronizzazione"
        errorMsg={error}
        visible={visible}
        setVisible={setVisible}
      />
    </RealmProvider>
  );
}

Stacktrace & log output

03-14 16:25:28.255 6242 6302 W ReactNativeJS:
03-14 16:25:28.255 6242 6302 W ReactNativeJS: URL: 10.0.2.2:8081
03-14 16:25:28.255 6242 6302 W ReactNativeJS:
03-14 16:25:28.255 6242 6302 W ReactNativeJS: Error: Software caused connection abort
03-14 16:25:28.389 6242 6302 I ReactNativeJS: 'Connection state changed', 'active'
03-14 16:25:29.083 6242 6302 I ReactNativeJS: 'Connection state changed', 'active'
03-14 16:25:29.099 6242 6302 E ReactNativeJS: [error] Failed to resolve 'ws.eu-west-1.aws.realm.mongodb.com:443': Host not found (authoritative)
03-14 16:25:29.100 6242 6302 I ReactNativeJS: 'Connection state changed', 'active'
03-14 16:25:29.101 6242 6302 I ReactNativeJS: 'error', { [SyncError: Failed to connect to sync: Host not found (authoritative)]
03-14 16:25:29.101 6242 6302 I ReactNativeJS: name: 'SyncError',
03-14 16:25:29.101 6242 6302 I ReactNativeJS: isOk: false,
03-14 16:25:29.101 6242 6302 I ReactNativeJS: reason: 'Failed to connect to sync: Host not found (authoritative)',
03-14 16:25:29.101 6242 6302 I ReactNativeJS: code: 1034,
03-14 16:25:29.101 6242 6302 I ReactNativeJS: category: 'UNKNOWN',
03-14 16:25:29.101 6242 6302 I ReactNativeJS: logUrl: '',
03-14 16:25:29.101 6242 6302 I ReactNativeJS: userInfo: {},
03-14 16:25:29.101 6242 6302 I ReactNativeJS: isFatal: false }
03-14 16:25:29.104 6242 6302 I ReactNativeJS: 'user', { listeners:
03-14 16:25:29.104 6242 6302 I ReactNativeJS: { listeners: {},
03-14 16:25:29.104 6242 6302 I ReactNativeJS: options: { add: [Function: add], remove: [Function: remove] } },
03-14 16:25:29.104 6242 6302 I ReactNativeJS: internal: {},
03-14 16:25:29.104 6242 6302 I ReactNativeJS: app:
03-14 16:25:29.104 6242 6302 I ReactNativeJS: { listeners:
03-14 16:25:29.104 6242 6302 I ReactNativeJS: { listeners: {},
03-14 16:25:29.104 6242 6302 I ReactNativeJS: options: { add: [Function: add], remove: [Function: remove] } },
03-14 16:25:29.104 6242 6302 I ReactNativeJS: internal: {} },
03-14 16:25:29.104 6242 6302 I ReactNativeJS: cachedProfile: undefined }
03-14 16:25:29.323 6242 6302 I ReactNativeJS: 'user', { listeners:
03-14 16:25:29.323 6242 6302 I ReactNativeJS: { listeners: {},
03-14 16:25:29.323 6242 6302 I ReactNativeJS: options: { add: [Function: add], remove: [Function: remove] } },
03-14 16:25:29.323 6242 6302 I ReactNativeJS: internal: {},
03-14 16:25:29.323 6242 6302 I ReactNativeJS: app:
03-14 16:25:29.323 6242 6302 I ReactNativeJS: { listeners:
03-14 16:25:29.323 6242 6302 I ReactNativeJS: { listeners: {},
03-14 16:25:29.323 6242 6302 I ReactNativeJS: options: { add: [Function: add], remove: [Function: remove] } },
03-14 16:25:29.323 6242 6302 I ReactNativeJS: internal: {} },
03-14 16:25:29.323 6242 6302 I ReactNativeJS: cachedProfile: undefined }

Can you reproduce the bug?

Always

Reproduction Steps

• Start application in an Emulator.
• Go offline, disabling wifi

Version

0.6.2

What services are you using?

Atlas Device Sync

Are you using encryption?

No

Platform OS and version(s)

Windows 10, React Native, Android 14

Build environment

adb logcat

Cocoapods version

No response

[sync-by-unito]

➤ PM Bot commented:

Jira ticket: RJS-2759

[kneth]

Host not found (authoritative) means you are offline. It is a bit confusing that the sync client reports it as an error.

From the title of the issue, it sounds like you are experiencing a variation of realm/realm-core#7349. We are actively working on a fix.

[mancioshell]

@kneth is it possible to do a workaround in the meanwhile you have done the fix? i need to work in offline mode, but unfortunately the app crash when i receive the error.

[mancioshell]

For anyone has my same problem, i have downgraded the peerDependency realm to 11.10.2 and it works like a charm.

[riohifi]

const behaviorConfiguration = {
type: OpenRealmBehaviorType.OpenImmediately,
timeOut: 3000,
timeOutBehavior: OpenRealmTimeOutBehavior.OpenLocalRealm,
};

OpenImmediately not DownloadBeforeOpen then works

[mancioshell]

@riohifi Not for me. I have already try this configuration without success. I have solved only downgrading version.

[kneth]

The fix is in [v12.7.0-rc.0][https://github.com/realm/realm-js/releases/tag/v12.7.0-rc.0)

[mancioshell]

@kneth i have update to 12.7.9-rc.0 but now if i open the app when offline, i receive this error which cause the crash of the app:

04-04 17:43:24.278 32030 32096 E ReactNativeJS: [Realm.App - error] App: request location failed (CustomError -1): request to https://realm.mongodb.com/api/client/v2.0/app/easy-report-gmzgp/location failed, reason: Network request failed

[mancioshell]

please reopen the issue

[vatsal-gadhiya-searce]

I am getting the same issues in react native 0.73.1 app, running 12.5.0.

SyncError: Failed to connect to sync: Host not found (authoritative)
[error] Failed to resolve 'ws.eu-west-2.aws.realm.mongodb.com:443': Host not found (authoritative)

Is it resolved anywhere?

[Christiangsn]

Is it resolved anywhere??

[vatsal-gadhiya-searce]

@Christiangsn I mean I am not sure if it is breaking anything or not in our app. But it comes through a bugsnag logs in our react native application using realm.

[Christiangsn]

@Christiangsn I mean I am not sure if it is breaking anything or not in our app. But it comes through a bugsnag logs in our react native application using realm.

Should I just ignore the error log? Because I noticed that when the internet comes back, it reconnects automatically... Another point, how can I synchronize the data? Do you have an example?