Unable to sync data after a network disconnection

Aperta
  • Qualcosa non va?
#9,063 0 commenti 0 reazioni 0 assegnatari Vedi su GitHub

Nessuno ha ancora preso questa issue.

Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
35/100
Tipo di issue
Bug
Chiarezza
Da chiarire
Stato di attività
Ferma
Stack tecnologico
android, angular, javascript
Ambito
databases, distributed-systems, mobile-dev

Direzione di ricerca

Inizia dagli entry point createPouchDB, postPouchDB, syncPouchDB e handlePouchDBError del servizio collegato, quindi riproduci una breve interruzione di rete con le versioni indicate di PouchDB, Cordova Android e CouchDB. Confronta i log paused, active ed error per determinare perché il live retry smette di fare progressi; il lavoro è completo quando la sincronizzazione riprende e i dati continuano a essere trasferiti dopo la riconnessione.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

Description

I've been using pouchdb on tablets using it to syncing data from multiple tablets on a couchdb server. While using my tablets I occasionnally loose internect connection for a few microseconds. In most cases no issues but on few instances the sync seems to not work anymore and i do not get any more data from my tablets.

Info

  • Environment: Pouch 7.3.1
  • Platform: Cordova Android 11 & Angular 14
  • Server: CouchDB 3.3.1 and PouchDB Server

Reproduce

I know the context can be very specific but i'll still link samples of my pouchdb service and some logs i've got spotting this issue. I do send data using the postPouchDB function

Service
public createPouchDB(id: string) {
    const nameDB = id + '-' + this.deviceUUID;
    const remoteNameDB = id + '-' + this.deviceUUID;
    this.localDB = new PouchDB(nameDB);

    this.localDB
      .createIndex({
        index: {
          fields: ['id'],
        },
      })
      .then((index_session) => {
        this.logService.logDebug('Index : ' + JSON.stringify(id));
      })
      .catch(function (err) {
        this.logService.logError('createIndex error : ' + JSON.stringify(err));
        this.handlePouchDBError(err);
      });

    this.remoteDB = new PouchDB(this.environmentService.environment.urlCouchdb + remoteNameDB, {
      auth: {
        username: this.environmentService.environment.usernameCouchdb,
        password: this.environmentService.environment.passwordCouchdb,
      },
    });
  }

  public postPouchDB(answer: Answer) {
    this.logService.logInfo(`postPouchDB answer : ${JSON.stringify(answer)}`);
    this.localDB.post(answer);
  }

  public syncPouchDB() {
    // this syncs in both directions: from remote and to remote
    this.localDB
      .sync(this.remoteDB, {
        live: true, // continuously sync between local and remote.
        retry: true, // Retry on connection lost.
      })
      .on('paused', (info) => {
        // replication was paused, usually because of a lost connection.
        this.logService.logDebug('La replication a été mise en pause : ' + JSON.stringify(info));
        this.tabletteAnimationLogService.createLog('pause', JSON.stringify(info), 'pouchdb');
      })
      .on('active', (info) => {
        // replication was resumed.
        this.logService.logDebug('La replication a été activée : ' + JSON.stringify(info));
      })
      .on('change', (change) => {
        // something did change.
        this.logService.logDebug('Il y a eu un changement dans la synchronisation pouchDB : ' + JSON.stringify(change));
      })
      .on('error', (error) => {
        // error happened.
        this.logService.logError('Il y a eu une erreur dans la synchronisation pouchDB : ' + JSON.stringify(error));
        this.tabletteAnimationLogService.createLog('error', JSON.stringify(error), 'pouchdb');
        this.handlePouchDBError(error);
      });
  }

  protected handlePouchDBError(error) {
    const pouchDBError = PouchDBErrors.generateErrorFromResponse(error);
    this.logService.logError("PouchDBError : " + JSON.stringify(pouchDBError));
  }
Logs
2025-01-17 12:28:59.664 : DEBUG : La replication a été mise en pause : undefined
2025-01-17 12:29:01.443 : DEBUG : La replication a été activée : {"direction":"push"}
2025-01-17 12:29:01.765 : DEBUG : La replication a été mise en pause : undefined
2025-01-17 12:29:04.060 : DEBUG : La replication a été activée : {"direction":"push"}
2025-01-17 12:29:04.480 : DEBUG : La replication a été mise en pause : undefined
2025-01-17 12:29:06.438 : DEBUG : La replication a été activée : {"direction":"push"}
2025-01-17 12:29:06.830 : DEBUG : La replication a été mise en pause : undefined
2025-01-17 12:29:07.873 : DEBUG : La replication a été activée : {"direction":"push"}
2025-01-17 12:29:08.219 : DEBUG : La replication a été mise en pause : undefined

It seems that it trys to sync but soen't succeed and does it again.

Thanks for the help !

Lingua principale
JavaScript
Stelle
17.6k
Fork
1.5k
Nessuna PR unita negli ultimi 30g

Preparare l'ambiente

Come iniziare

  1. Leggi tutta la issue e poi la guida ai contributi del progetto.
  2. Commenta sulla issue per dire che te ne occupi tu — evita che due persone facciano lo stesso lavoro.
  3. Fai un fork del repository e lavora su un branch.
  4. Apri una pull request che faccia riferimento al numero della issue.

Altre issue di apache/pouchdb

Tutte le issue di apache/pouchdb

Issue simili

Altre issue su JavaScript

Ricevi le nuove issue nella tua casella

Un breve riepilogo di issue GitHub adatte ai principianti.