zrlw commented on issue #8805:
URL: https://github.com/apache/dubbo/issues/8805#issuecomment-919741212
前面还有LazyConnectExchangeClient的warning
```
2021-09-15T03:06:39.5666317Z [15/09/21 03:06:36:036 UTC] DubboShutdownHook
WARN dubbo.ReferenceCountExchangeClient: [DUBBO] 192.168.16.2:20880
org.apache.dubbo.samples.annotation.api.HelloService:1.0.0_annotation safe
guard client , should not be called ,must have a bug., dubbo version:
3.0.3-SNAPSHOT, current host: 192.168.16.3
```
warning方法的注解说warn once every 5000
invocations，但是第一次调用就会warning，因为warningcount为0，模多少都还是0：
```
if (warningcount.get() % warning_period == 0) {
logger.warn(url.getAddress() + " " + url.getServiceKey() + "
safe guard client , should not be called ,must have a bug.");
}
warningcount.incrementAndGet();
```
LazyConnectExchangeClient的request为什么会被DubboShutdownHook调用？
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