defer sys.hMutex.RUnlock()
	if h, ok := sys.hc[ep.Host]; ok {
		return !h.Online
	}
	go sys.initHC(ep)
	return false
}

// markOffline sets endpoint to offline if network i/o timeout seen.
func (sys *BucketTargetSys) markOffline(ep *url.URL) {
	sys.hMutex.Lock()
	defer sys.hMutex.Unlock()
	if h, ok := sys.hc[ep.Host]; ok {
		h.Online = false
		sys.hc[ep.Host] = h
	}
}

				err = msgp.WrapError(err, "RmvTagTotal")
				return
			}
		case "gc":
			z.GetTotal, err = dc.ReadUint64()
			if err != nil {
				err = msgp.WrapError(err, "GetTotal")
				return
			}
		case "hc":
			z.HeadTotal, err = dc.ReadUint64()
			if err != nil {
				err = msgp.WrapError(err, "HeadTotal")
				return
			}
		case "ptf":
			z.PutTagFailedTotal, err = dc.ReadUint64()
			if err != nil {

	RmvTagTotal       uint64 `json:"removeTaggingProxyTotal" msg:"rtc"`
	GetTotal          uint64 `json:"getProxyTotal" msg:"gc"`
	HeadTotal         uint64 `json:"headProxyTotal" msg:"hc"`
	PutTagFailedTotal uint64 `json:"putTaggingProxyFailed" msg:"ptf"`
	GetTagFailedTotal uint64 `json:"getTaggingProxyFailed" msg:"gtf"`
	RmvTagFailedTotal uint64 `json:"removeTaggingProxyFailed" msg:"rtf"`