@Required
    @Min(-1)
    @Max(10000)
    @ValidateTypeFailure
    public Integer failureCountThreshold;

    @Size(max = 10)
    public String popularWord;

    @Required
    @Size(max = 20)
    public String csvFileEncoding;

    @Min(-1)
    @Max(100000)
    @ValidateTypeFailure
    public Integer purgeSearchLogDay;

    @Min(-1)
    @Max(100000)
    @ValidateTypeFailure