Why I always get "unknown format:" when I use json config file

[kuailezhish]

Proto file(s)
helloworld.proto

syntax = "proto3";

option java_multiple_files = true;
option java_package = "io.grpc.examples.helloworld";
option java_outer_classname = "HelloWorldProto";

package helloworld;

// The greeting service definition.
service Greeter {
    // Sends a greeting
    rpc SayHello (HelloRequest) returns (HelloReply) {
    }
}

// The request message containing the user's name.
message HelloRequest {
    string name = 1;
}

// The response message containing the greetings
message HelloReply {
    string message = 1;
}

Command line arguments / config
config.json is in the same directory with helloworld.proto, its content:

{
  "insecure": true,
  "proto": "helloworld.proto",
  "call": "helloworld.Greeter.SayHello",
  "total": 200,
  "concurrency": 10,
  "data": {
    "name": "Joe"
  },
  "host": "localhost:8099"
}

Describe the bug
when I used this command ghz --config=config.json, I got unknown format:
when I used another command ghz -config ./config.json, I got ghz: error: strconv.ParseUint: parsing "onfig": invalid syntax, try --help

I can success running rpc test with pure command Line ghz --insecure --proto ./helloworld.proto --call helloworld.Greeter.SayHello -d '{"name":"Joe"}' localhost:8099
How can I change my config so that I can use json config file?

Environment

• OS: macOS 10.14.1
• ghz: 0.35.0

Additional context
My grpc service is started in localhost with port 8099

[bojand]

Hello, thanks for the reporting this issue. Seems a small bug was introduced in a recent release. I believe this should be addressed now in 0.35.1. Please let me know if this is still an issue.

[kuailezhish]

Thanks for your handling this problem very quickly! Now, the issue is gone, and I can load json config file successfully. :-)