ThreadPoolExhaustedListener 在最新版本中未发现用户配置的入口，这个功能的设计初衷我理解，是发生线程池耗尽通知给应用，目前没看到应用如何添加监听的地方。
String SSL_ENABLED_KEY = "ssl-enabled";
    String SERVICE_PATH_PREFIX = "service.path.prefix";
    String PROTOCOL_SERVER_SERVLET = "servlet";
    String PROTOCOL_SERVER = "server";
    String IPV6_KEY = "ipv6";
    /**
     * The parameter key for the class path of the ServiceNameMapping {@link Properties} file
     *
     * @since 2.7.8
     */
    String SERVICE_NAME_MAPPING_PROPERTIES_FILE_KEY = "service-name-mapping.properties-path";
    /**
     * The default class path of the ServiceNameMapping {@link Properties} file
     *
     * @since 2.7.8
     */
    String DEFAULT_SERVICE_NAME_MAPPING_PROPERTIES_PATH = "META-INF/dubbo/service-name-mapping.properties";
    String CLASS_DESERIALIZE_BLOCK_ALL = "dubbo.security.serialize.blockAllClassExceptAllow";
    String CLASS_DESERIALIZE_ALLOWED_LIST = "dubbo.security.serialize.allowedClassList";
    String CLASS_DESERIALIZE_BLOCKED_LIST = "dubbo.security.serialize.blockedClassList";
    String ENABLE_NATIVE_JAVA_GENERIC_SERIALIZE = "dubbo.security.serialize.generic.native-java-enable";
    String SERIALIZE_BLOCKED_LIST_FILE_PATH = "security/serialize.blockedlist";
    String QOS_LIVE_PROBE_EXTENSION = "dubbo.application.liveness-probe";
    String QOS_READY_PROBE_EXTENSION = "dubbo.application.readiness-probe";
    String QOS_STARTUP_PROBE_EXTENSION = "dubbo.application.startup-probe";
    String REGISTRY_DELAY_NOTIFICATION_KEY = "delay-notification";
    String CACHE_CLEAR_TASK_INTERVAL = "dubbo.application.url.cache.task.interval";
    String CACHE_CLEAR_WAITING_THRESHOLD = "dubbo.application.url.cache.clear.waiting";
    String CLUSTER_INTERCEPTOR_COMPATIBLE_KEY = "dubbo.application.cluster.interceptor.compatible";
    String UTF8ENCODE = "UTF-8";