• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.3
• Operating System version: macOs
• Java version: 1.8

Steps to reproduce this issue

Step 1: Extend AuthFilter with order -20000.

@Activate(group = CommonConstants.PROVIDER, order = -20000)
public class AuthFilter Filter {

    @Override
    public Result invoke(Invoker<?> invoker, Invocation inv) throws RpcException {
    }
}

Step 2: We are not able to get RpcContext from the filter as ContextFilter cleared it with order -10000.

We shoudl move ContextFilter to the lowest one, leave more range for the user's extension.