Failed to expose metrics

Grafana Cloud
1

I am using spring-boot’s (v3) starter together with actuator:

<dependency>
	<groupId>com.grafana</groupId>
	<artifactId>grafana-opentelemetry-starter</artifactId>
	<version>1.3.2</version>
</dependency>
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

and configured everything according to Automatic Instrumentation of Spring Boot 3.x Applications with Grafana OpenTelemetry Starter | Opentelemetry documentation.
Everything seems to work fine (logs, traces), I do get even some metrics, but the app itself has an issue while exporting the metrics:

[grafana.net/...] i.o.e.internal.okhttp.OkHttpExporter : Failed to export metrics. Server responded with HTTP status code 400. Error message: Unable to parse response body, HTTP status message: Bad Request

Any ideas? Are assume it has something to do with prometheus format?

2

it looks like there is an issue with the api key.
you can check which config is used: Automatic Instrumentation of Spring Boot 3.x Applications with Grafana OpenTelemetry Starter | OpenTelemetry documentation

3

Why do you think it’s an key issue? I get 400 (and not 401/403) and some of the stuff being sent to grafana… Only metrics somehow fail