func (c *Config) OfflineThreshold() time.Duration {
	n := c.m.GetInt64("cluster.offline_threshold")
	return time.Duration(n) * time.Second
}
func (c *Config) OfflineThreshold() time.Duration {
	n := c.m.GetInt64("cluster.offline_threshold")
	return time.Duration(n) * time.Second
}
// OfflineThreshold returns the configured heartbeat threshold, i.e. the
// number of seconds before after which an unresponsive node is considered
// offline..