niejian opened a new issue, #3886:
URL: https://github.com/apache/shenyu/issues/3886
### Question
when I use nacos to sync data from `admin` to `bootstrap`. But when I start
`bootstap`, in its log,doesn't show data sync from `admin`, switch to
`websocket`, it shown。
* nacos config
```yaml
sync:
# websocket:
# urls: ws://localhost:9095/websocket
# zookeeper:
# url: localhost:2181
# sessionTimeout: 5000
# connectionTimeout: 2000
# http:
# url: http://localhost:9095
# username:
# password:
nacos:
url: 192.168.240.132:8841
namespace: public
username: nacos
password: nacos
```
* **use nacos to sync, `bootstrap` log show**

* **use websocket to sync**

any body konws why?
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