not resoponse when runiing in jdk21

[qiaofazhan]

Versions

• etcd: 3.5.3
• jetcd: 7.5
• java: jdk21

Describe the bug progrem code like this: GetOption op = GetOption.newBuilder().isPrefix(true).build(); CompletableFuture<GetResponse> getFuture= EtcdFactory.getKVClient().get(EtcdFactory.bytesOf(EtcdConstant.KEYPREFIX_PRODUCER),op); GetResponse response = null; try { response = getFuture.get();//keep blocking in java21 } catch (InterruptedException e) { log.error(Constant.LOG_ERR_PRE+"find etcd producer data error",e); throw new RuntimeException(e); } catch (ExecutionException e) { log.error(Constant.LOG_ERR_PRE+"find etcd producer data error",e); throw new RuntimeException(e); } List<KeyValue> list = response.getKvs();

//////////////////////// The above code works fine in java8; When upgrading java8 to java21, the above code will keep blocking the CompletableFuture get method； To Reproduce Run the above code in java21；

Expected behavior CompletableFuture can be returned normally

Additional context