dev.exs

config :opentelemetry, :processors,
  ot_batch_processor: %{
    exporter: {
      :opentelemetry_exporter,
      %{
        protocol: :grpc,
        endpoints: [
          {:http, "localhost", 55680, []},
        ]
      }
    }
  }

error

** (Mix) Could not start application opentelemetry: :opentelemetry_app.start(:normal, []) returned an error: shutdown: failed to start child: :ot_batch_processor
    ** (EXIT) {:badmatch, {:error, {:noproc, {:gen_server, :call, [:gproc_pool, {:new, :opentelemetry_exporter, :round_robin, [size: 1, autosize: true]}]}}}}

Hi @gugahoa - I came across this gist in https://gitter.im/open-telemetry/opentelemetry-erlang 🙂 I'm running into the same problem - what ended up fixing it for you? I noticed you said the problem was the protocol key, for some reason it's throwing a badmatch error - but in order to setup gRPC, don't you need to set the :protocol key?

@dwebster17 If I'm not mistaken, right now there's only support for grpc.

The config we're using is this one, and it's working, but I'm using an outdated version of both opentelemetry_exporter and opentelemetry_erlang (not related to this problem, we just didn't get around to update it yet)

# Configure OpenTelemetry
config :opentelemetry, :processors,
  ot_batch_processor: %{
    exporter: {
      :opentelemetry_exporter,
      %{
        endpoints: [
          {:http, "localhost", 55680, []}
        ]
      }
    }
  }