@lkj41110 NO , I found it is client is null, not Parameters Look at this code :
```java cc.getParameters().put(org.apache.dubbo.remoting.Constants.CLIENT_KEY, rc.getClient()); ``` If **cc.getParameters()** is NULL, it will throw an NullPointerException. if **rc.getClient()** is NULL, it will also throw an NullPointerException. #5185 fix the bug the previous one ONLY! [ Full content available at: https://github.com/apache/dubbo/issues/5216 ] This message was relayed via gitbox.apache.org for [email protected]
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