[GitHub] [dubbo] kathetina opened issue #4833: [Finalizer] WARN org.apache.dubbo.config.ReferenceConfig$1 (ReferenceConfig.java:182) - [DUBBO] ReferenceConfig(null) is not DESTROYED when FINALIZE, dubbo version: 2.7.2

[GitHub]

* Dubbo version: 2.7.2
* Java version: 1.8

Code:
public static <T> T getBeanByGroup(Class<T> bean, String group) throws 
RuntimeException {
                T service = null;
                try {
               // 引用远程服务
                ReferenceConfig<T> reference = new ReferenceConfig<T>();
                        reference.setInterface(bean);
                        // reference.setVersion("");
                        // 服务分组
                        if (!StringUtil.isEmpty(group)) {
                                reference.setGroup(group);
                        }
                        // 当前消费者应用配置
                        ApplicationConfig application = new 
ApplicationConfig(getAppName());
                        reference.setApplication(application);
                        reference.setRegistry(registry);
                        // 缓存reference实例
                        ReferenceConfigCache referenceConfigCache =    
ReferenceConfigCache.getCache();
                        service =  referenceConfigCache.get(reference);
                } catch (Exception e) {
                        throw new RuntimeException(e.getMessage());
                }
                return service;
        }

Appearance：
<img width="1435" alt="image" 
src="https://user-images.githubusercontent.com/8829397/63080215-21c1bd00-bf73-11e9-8c99-0bd6afbf04c2.png";>



[ Full content available at: https://github.com/apache/dubbo/issues/4833 ]
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