![image](https://user-images.githubusercontent.com/54169514/199922630-ba1b1417-e124-40b1-bac7-49158e2adbca.png)

文档上ApplicationConfig的enableFileCache属性默认true，但是在Dubbo3.1版本中，该属性似乎默认为null，导致mapping和元数据无法在本地缓存。

![image](https://user-images.githubusercontent.com/54169514/199923129-c99ea29b-45c5-40d1-bc21-1fbb44830fc7.png)

return dumpDirectory;
    }
    public void setDumpDirectory(String dumpDirectory) {
        this.dumpDirectory = dumpDirectory;
    }
    @Parameter(key = QOS_ENABLE)
    public Boolean getQosEnable() {
        return qosEnable;
    }
    public void setQosEnable(Boolean qosEnable) {
        this.qosEnable = qosEnable;
    }
    @Parameter(key = QOS_HOST)
    public String getQosHost() {
        return qosHost;
    }
    public void setQosHost(String qosHost) {
        this.qosHost = qosHost;
    }
    @Parameter(key = QOS_PORT)
    public Integer getQosPort() {
        return qosPort;
    }
    public void setQosPort(Integer qosPort) {
        this.qosPort = qosPort;
    }
    @Parameter(key = ACCEPT_FOREIGN_IP)
    public Boolean getQosAcceptForeignIp() {
        return qosAcceptForeignIp;
    }