dugenkui03 opened a new issue #2592: 缓存对象回收 URL: https://github.com/apache/incubator-dubbo/issues/2592 https://github.com/apache/incubator-dubbo/tree/master/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/support/expiring 您好，ExpiringCache对象是否创建了便永远不可被回收？ 原因： 1. `ExpiringCache` 对象变量的`store.clear()`方法没有被调用的入口。 2. 获取`ExpiringCache`对象时，会启动线程执行 检查缓存数据是否过期 的任务。任务中有对`ExpiringMap.delegateMap`的引用。**因此即使创建`ExpiringCache`对象的线程终止后，因为 "超时检查线程"的存在，会导致`ExpiringCache`以其引用的对象不能被回收**。 相关代码： ``` //创建缓存对象时调用 expiringMap.getExpireThread().startExpiryIfNotStarted(); //超时检测任务类引用 for (ExpiryObject o : delegateMap.values()) //ExpiringCache无法调用此方法 @Override public void clear() { delegateMap.clear(); expireThread.stopExpiring(); } ```
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