CommonHttpDispatcher does not invoke handler chain and Configured Auth handler is not triggered

I have an issue in `CommonHttpDispatcher` in that the consumer auth handlers configured for the registered third party microservice are not triggered.
Can you help here? Why handlers are not triggered on using this dispatcher?

This is my configuration. Here `authClientGrant` is a consumer auth handler configured for the registered third party service `mfa-login-service` . At run time after `CommonHttpDispatcher` picks the path for routing, the request is forwarded to the `mfa-login-service` . But none of the handlers are triggered before invocation.
```
servicecomb-config-order: 100
servicecomb:
service:
application: m1-services
name: gateway
properties:
allowCrossApp: true #whether to allow calls across applications
version: 0.0.4
registry:
# Default using local service center
address: http://localhost:30100
instance:
watch: false
edge:
filter:
addHeader:
enabled: true
allowedHeaders: xxx
handler:
chain:
Consumer:
default: loadbalance,tracing-consumer
service:
mfa-login-service: authClientGrant,loadbalance,tracing-consumer
Provider:
default: bizkeeper-provider,tracing-provider
rest:
address: 0.0.0.0:9091?sslEnabled=false
tracing:
enabled: true
http:
dispatcher:
edge:
http:
enabled: true
order: 1
mappings:
oauthAdmin:
path: "/admin/oauth/.*"
microserviceName: oauth-service
prefixSegmentCount: 1
versionRule: 0.0.0+
mfaServices:
path: "/a/mfa/login/.*"
microserviceName: mfa-login-service
prefixSegmentCount: 1
versionRule: 0.0.0+
```

まず、issue の設定を再現セットアップとして使用し、エッジルーティングから設定された Consumer handler chain まで CommonHttpDispatcher を追跡します。mfa-login-service への転送前に authClientGrant が呼び出されない理由を特定します。この dispatcher path で設定された consumer handler が実行され、リポジトリに回帰テストがある場合はそのテストによって動作が検証されれば完了です。

索引モデルが issue の本文から書いたものです。