![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)

/**
     * Environment, e.g. dev, test or production
     */
    private String environment;
    /**
     * Java compiler
     */
    private String compiler;
    /**
     * The type of the log access
     */
    private String logger;
    /**
     * Registry centers
     */
    private List<RegistryConfig> registries;
    private String registryIds;
    /**
     * Monitor center
     */
    private MonitorConfig monitor;
    /**
     * Directory for saving thread dump
     */
    private String dumpDirectory;
    /**
     * Whether to enable qos or not
     */
    private Boolean qosEnable;
    /**