### Environment

* Dubbo version: 2.7.3
* Operating System version: win 10
* Java version: 1.8

系统启动时报
Caused by: java.lang.IllegalArgumentException: Unsupported generic type false
	at org.apache.dubbo.config.ServiceConfig.setGeneric(ServiceConfig.java:1015)

这个错误只有在2.7.3的时候存在，在使用2.7.2的时候没有
* Actually，when the {@link ExtensionLoader} init the {@link Protocol} instants,it will automatically wraps two
     * layers, and eventually will get a <b>ProtocolFilterWrapper</b> or <b>ProtocolListenerWrapper</b>
     */
    private static final Protocol protocol = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();
    /**
     * A {@link ProxyFactory} implementation that will generate a exported service proxy,the JavassistProxyFactory is its
     * default implementation
     */
    private static final ProxyFactory PROXY_FACTORY = ExtensionLoader.getExtensionLoader(ProxyFactory.class).getAdaptiveExtension();
    /**
     * A random port cache, the different protocols who has no port specified have different random port
     */
    private static final Map<String, Integer> RANDOM_PORT_MAP = new HashMap<String, Integer>();
    /**
     * A delayed exposure service timer
     */
    private static final ScheduledExecutorService DELAY_EXPORT_EXECUTOR = Executors.newSingleThreadScheduledExecutor(new NamedThreadFactory("DubboServiceDelayExporter", true));
    /**
     * The urls of the services exported
     */
    private final List<URL> urls = new ArrayList<URL>();
    /**
     * The exported services
     */
    private final List<Exporter<?>> exporters = new ArrayList<Exporter<?>>();
    /**
     * The interface name of the exported service
     */
    private String interfaceName;
    /**