zrlw opened a new issue #8980:
URL: https://github.com/apache/dubbo/issues/8980
### Environment
* Dubbo version: 3.0 / master
3.0 github日志：
```
org.opentest4j.AssertionFailedError: expected: <0> but was: <1>
at
org.apache.dubbo.registry.support.FailbackRegistryTest.testRecover(FailbackRegistryTest.java:173)
```
173行代码为：```Assertions.assertEquals(0,
mockRegistry.getFailedRegistered().size());```
原因：FailedRegisteredTask和FailedSubscribedTask的doRetry都是先执行doRegister或doSubscribe，再删掉failed
task；但MockRegistry在doRegister和doSubscribe就做了latch.countDown()，所以latch.await()返回时机过早导致上述断言失败。
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