Nacos 2.0.4 Cluster mode When Skywalking Agent is used, services cannot be registered

[ZhengBing520]

Describe the bug
Nacos 2.0.4 Cluster mode When Skywalking Agent is used, services cannot be registered
nacos.logoutput error log: java.lang.ClassCastException: io.grpc.ClientInterceptors$InterceptorChannel cannot be cast to io.grpc.ManagedChannel
cause：

1. skywalking agent：enhance io.grpc.stub.AbstractStub#getChannel，convert ClientInterceptors.InterceptorChannel
2. nacos server：grpcConn.setChannel((ManagedChannel) newChannelStubTemp.getChannel()); (GrpcClient.java:281)

Expected behavior
Normal Running .

Acutally behavior
Demo registration and communication are affected. Services can be found from the service list in the Nacos console, but an error is reported when editing the service
(影响demo注册和通信，可以从nacos控制台的服务列表中发现服务，但是编辑服务时报错，报错位置如下)
ServiceManager#updateInstance -> throw new NacosException(NacosException.INVALID_PARAM, "instance not exist: " + instance);
This indicates that the instance was not registered successfully

How to Reproduce
Steps to reproduce the behavior:

1. Running cluster Mode(3 nodes): -Dserver.port -Dnacos.home -Dnacos.logs.path -Dnacos.standalone=false
2. Agent is configured for both the NACOS service and Demo: -javaagent:/skywalking/skywalking-agent/skywalking-agent.jar
3. View the log from nacos.log
4. See error:
   java.lang.ClassCastException: io.grpc.ClientInterceptors$InterceptorChannel cannot be cast to io.grpc.ManagedChannel
   at com.alibaba.nacos.common.remote.client.grpc.GrpcClient.connectToServer(GrpcClient.java:281)
   at com.alibaba.nacos.common.remote.client.RpcClient.reconnect(RpcClient.java:522)
   at com.alibaba.nacos.common.remote.client.RpcClient.lambda$start$2(RpcClient.java:370)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
   at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   at java.lang.Thread.run(Thread.java:748)
   2022-04-28 12:58:42,189 INFO [Cluster-192.168.90.75:8868] Fail to connect server, after trying 315 times, last try server is {serverIp = '192.168.90.75', server main port = 8868}, error = unknown

Desktop (please complete the following information):

• OS: Centos、Windows
• Version nacos-server 2.0.4, nacos-client 2.0.4
• Module naming (console)
• SDK spring-cloud-alibaba-nacos + nacos-client 2.0.4 + skywalking agent 8.7

Additional context

[ZhengBing520]

The first time I submitted it, my PR was stuck. Could you give me some help

[bangbang2333]

帮顶

[Oliverwqcwrw]

Hello, @ZhengBing520
Is the agent also specified when the cluster is started？
Whether the cluster uses embedded datasource or external datasource？

[ZhengBing520]

Hello, @ZhengBing520 Is the agent also specified when the cluster is started？
Yes, the cluster is connected to the Agent to get the complete tracking data

Whether the cluster uses embedded datasource or external datasource？
external datasource，using MySQL

[ZhengBing520]

hello, @Oliverwqcwrw
sound code ：grpcConn.setChannel((ManagedChannel) newChannelStubTemp.getChannel()); (GrpcClient.java:281)
We can tweak the code so that instead of going directly to ManagedChannel
Please take a look at this pr: #8276
Thank you

[Oliverwqcwrw]

I am trying to reproduce this problem. If it does, I will see if your PR solves the problem

[ZhengBing520]

I am trying to reproduce this problem. If it does, I will see if your PR solves the problem

Thanks for you

[Oliverwqcwrw]

hello, @Oliverwqcwrw sound code ：grpcConn.setChannel((ManagedChannel) newChannelStubTemp.getChannel()); (GrpcClient.java:281) We can tweak the code so that instead of going directly to ManagedChannel Please take a look at this pr: #8276 Thank you

I have reproduced the problem and verified your PR, it is a good discovery. Thank you for your contribution to the community. It will be merged after @shiyiyue1102 review passed

[ZhengBing520]

Sorry, My misoperation

[ZhengBing520]

hello, @Oliverwqcwrw sound code ：grpcConn.setChannel((ManagedChannel) newChannelStubTemp.getChannel()); (GrpcClient.java:281) We can tweak the code so that instead of going directly to ManagedChannel Please take a look at this pr: #8276 Thank you

I have reproduced the problem and verified your PR, it is a good discovery. Thank you for your contribution to the community. It will be merged after @shiyiyue1102 review passed

Thanks for you. This is the first issue I opened, I am not familiar with the process

[Oliverwqcwrw]

It doesn't matter. You can talk about any problems. The community is very friendly