select {
	case <-s.workerCh: // block till a worker is available
	case <-ctx.Done():
		return
	}

	resyncStatus := ResyncFailed
	defer func() {
		s.markStatus(resyncStatus, opts, objectAPI)
		globalSiteResyncMetrics.incBucket(opts, resyncStatus)
		s.workerCh <- struct{}{}
	}()
	// Allocate new results channel to receive ObjectInfo.
	objInfoCh := make(chan itemOrErr[ObjectInfo])