JVM metrics and Service Name Issues with opentelemetry

Question

I am using opentelemetry to send metrics to prometheus and I am using otlp exporter. But I am facing 2 issues there.

1. Service name is coming as unknown_serive:java .

2. jvm/auto-instrumented metrics are not coming.

If anyone can help here, it would be great. Thanks!

For fixing the service-name issue, I tried 3 solutions,

1. I set OTEL_SERVICE_NAME variable in config map.
2. I tried passing -Dotel.service.name but this is also not working.
3. I tried passing service.name value in OTEL_RESOURCE_ATTRIBUTES, but that too doesn't work.

For jvm metrics, i set -Dotel.javaagent.enabled=true, but metrics still not coming.

My otel-config.yaml file is

exporters:
    otlp:
        endpoint: some-endpoint
        tls:
            insecure: true
    prometheusremotewrite:
        endpoint: some-endpoint
        resource_to_telemetry_conversion:
            enabled: true