if err != nil {
		writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	buckets := make([]string, 0, len(bucketInfos))
	for _, bInfo := range bucketInfos {
		buckets = append(buckets, bInfo.Name)
	}

	var id string
	if id, err = pools.initRebalanceMeta(ctx, buckets); err != nil {
		writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}