Cannot Find Service - GHZ to load test GRPC Service - grpc

Question

I'm trying to test a GRPC Service using GHZ. However, I get the error -
Cannot find service "com.server.grpc.Executor"
Config.json file:
"proto": "/Users/dev/Desktop/ghz/execute.proto",
"call": "com.server.grpc.Executor.execute",
"total": 2000,
"concurrency": 50,
"data": {
"param1": "test-data1",
"param2": "test-data2",
},
"max-duration": "10s",
"host": "<ip-address>:9090",
"c": 10,
"n": 200
}
proto file:
option java_package= "com.server.grpc";
option java_multiple_files = true;
service Executor {
rpc execute(ExecuteRequest) returns (ExecuteResponse);
}
message ExecuteRequest {
string param1 = 1;
string param2= 2;
}
message ExecuteResponse {
bool res = 1;
string msg = 2;
}
Running using command: ghz --config=<path/to/config>/config.json
Is there anything I'm missing?

Answer 1

Your protobuf file should contain e.g.:
syntax = "proto3";
package example;
...
Then, your service would be fully-qualified by example.Executor.execute not com.server.grpc.Execute.execute which is a language-specific (I assume, Java by your option) fully-qualified name.
I assume you unintentionally omitted the opening brace ({) of the JSON file but that, of course, is required.
JSON is challenging your "param2": "test-data2" must not be terminated with , because it's the last item in the list; so drop that comma.
{
"proto": "/Users/dev/Desktop/ghz/execute.proto",
"call": "example.Executor.execute",
"total": 2000,
"concurrency": 50,
"data": {
"param1": "test-data1",
"param2": "test-data2"
},
"max-duration": "10s",
"host": "<ip-address>:9090",
"c": 10,
"n": 200
}
Assuming your service is running on <ip-address>:9090, that should then work!