bucketL)
	bucketReplLatencyMsMD = NewGaugeMD(bucketReplLatencyMs,
		"Replication latency on a bucket in milliseconds",
		bucketL, operationL, rangeL, targetArnL)
	bucketReplProxiedDeleteTaggingRequestsTotalMD = NewCounterMD(bucketReplProxiedDeleteTaggingRequestsTotal,
		"Number of DELETE tagging requests proxied to replication target",
		bucketL)

	return fd.readLock()
}

// ReadUnlock wraps FD.readUnlock.
func (fd *FD) ReadUnlock() {
	fd.readUnlock()
}

func isHangup(err error) bool {
	return err != nil && stringslite.HasSuffix(err.Error(), "Hangup")
}

func isInterrupted(err error) bool {
	return err != nil && stringslite.HasSuffix(err.Error(), "interrupted")
}

// IsPollDescriptor reports whether fd is the descriptor being used by the poller.