damonxue opened a new issue, #3357:
URL: https://github.com/apache/incubator-shenyu/issues/3357
### Is there an existing issue for this?
- [X] I have searched the existing issues
### Current Behavior
@see org.apache.shenyu.loadbalancer.cache.UpstreamCheckTask#check(Map)
the `futures.add(future);` just to `waitFinish()` forEach then clear();
took twice O(n).
### Expected Behavior
use ComplatableFuture.thenAcceptAsync()
```java
CompletableFuture.supplyAsync(() -> check(key, upstream), executor)
.thenAcceptAsync(this::putEntityToMap);
```
### Steps To Reproduce
_No response_
### Environment
```markdown
ShenYu version(2.4.3):
```
### Debug logs
maybe unnessary forEach future, just ComplatableFuture.thenAcceptAsync
### Anything else?
_No response_
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