The conf dfs.datanode.lifeline.interval.seconds is not considering time unit seconds

long confLifelineIntervalMs =
    getConf().getLong(DFS_DATANODE_LIFELINE_INTERVAL_SECONDS_KEY,
    3 * getConf().getTimeDuration(DFS_HEARTBEAT_INTERVAL_KEY,
    DFS_HEARTBEAT_INTERVAL_DEFAULT, TimeUnit.SECONDS,
        TimeUnit.MILLISECONDS));