Method _scheduleStalledCheck

lib/queue.js:781–789

(interval, cb)

  }

  _scheduleStalledCheck(interval, cb) {
    if (this.checkTimer || this.paused) return;
    this.checkTimer = setTimeout(() => {
      // The checkTimer is unset and cleared when Queue#close is called,
      // so we don't need to check for it here.
      this.checkTimer = null;
      this._safeCheckStalledJobs(interval, cb);
    }, interval);
  }

  _checkStalledJobs(interval, cb) {
    const promise = this._doStalledJobCheck();