sentinelclient通过docker镜像启动,后，线程数设置为1，只能限制单机

## Issue Description
*bug report*

### Describe what happened (or what feature you want)

sentinelclient通过docker镜像启动,后，线程数设置为1，只能限制单机，其他机器之间还能发通请求
### Describe what you expected to happen


### How to reproduce it (as minimally and precisely as possible)

1. dashboard以jar包的形式启动
2. 两个节点在相同机器的不同端口上启动
3. 一个节点上执行 如下代码
4. 
5. 后续该节点的限流生效
6. 同一集群下的其他节点不受限流影响

### Tell us your environment

### Anything else we need to know?

Start by reproducing the report with the dashboard started from a JAR and two nodes on different ports under the same cluster, using the linked screenshots and example code as the available reproduction details. Compare rate limiting on the initiating node with the other node; the issue is done when the intended thread limit behaves consistently across the cluster.

Written by the indexing model from the issue text.