GetTopChannels returns empty resposne

[ambigu...@gmail.com]

Hello,

I used the channelz to debug my gRpc Service. But I find that it returns empty channels, even if I send many requests.

Platform:

Linux 4.19.0-9-amd64 #1 SMP Debian 4.19.118-2 (2020-04-29) x86_64 GNU/Linux

gRpc 1.27.2

The minimal code to reproduce:

# server.py
import grpc
from concurrent import futures
from grpc_channelz.v1 import channelz


def serve():
    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
    server.add_insecure_port('127.0.0.1:5000')
    channelz.add_channelz_servicer(server)
    server.start()
    server.wait_for_termination()


if __name__ == '__main__':
    serve()

And I see that the channelz is enabled default. How can I get the gRpc channel information?

Thanks.

[Lidi Zheng]

Sorry the concepts are a bit confusing. The Channel concept in Channelz actually refers to "client". So, in a server application, you won't get statistics about any gRPC client. GetServers method should give what you need.