Hi,
I got the following error when running the command:
grpc_cli ls xx.xx.xx.xx:5678

E0617 22:59:51.243006   41726 loas_util.cc:468] generic::not_found: Role is 
invalid: .
E0617 22:59:51.250910   41761 loas_util.cc:468] generic::not_found: Role is 
invalid: .
E0617 22:59:51.262319   41726 loas_util.cc:440] generic::not_found: Role is 
invalid: .
E0617 22:59:51.294310   41828 loas_util.cc:440] generic::not_found: Role is 
invalid: .
E0617 22:59:51.295007   41827 naming_service.cc:1168] Unexpected service 
config health received for xx.xx.xx.xx:5678
Received an error when querying services endpoint.
ServerReflectionInfo rpc failed. Error code: 14, message: failed to connect 
to all addresses, debug info: 
{"created":"@1560812406.728533687","description":"Failed to pick 
subchannel","file":"third_party/grpc/src/core/ext/filters/client_channel/client_channel.cc","file_line":3378,"referenced_errors":[{"created":"@1560812406.728372027","description":"failed
 
to connect to all 
addresses","file":"third_party/grpc/src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":453,"grpc_status":14}]}

I followed the instructions at 
https://github.com/grpc/grpc/blob/master/doc/server_reflection_tutorial.md to 
enable the reflection service.

Can anyone tell me how to debug this issue?

Thanks,

Jun

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