Expected equal, got \"INVALID\""

Hi team,

I’m facing a problem regarding the scraping my nodejs application , I don’t have metrics anymore, is stop collect metrics after I restart the nodejs application, is working one hour then I receive the bellow error and the target is seen as “down” state on prometheus gui.

ts=2022-01-27T16:17:48.942Z caller=scrape.go:1307 level=debug component="scrape manager" scrape_pool=endpoints target=[ ]( msg="Append failed" err="expected equal, got \"INVALID\""

If i’m running curl command from other server , is shows all the metrics. I ran out of debug/investigation steps.
Prometheus is a pod and the nodejs is another pod in the same cluster. The prometheus is collecting without any problem metrics from other nodejs application.