Hi, I have built the Prometheus reporter package from this PR https://github.com/apache/flink/pull/4586, and used it on Flink 1.3.2 to record every default metrics and those from `FlinkKafkaConsumer`.
Originally, everything was fine. I could get those metrics in TM from Prometheus just like I saw on Flink Web UI. However, when I turned to JM, I found Prometheus gives this error to me: Get http://localhost:9249/metrics: EOF. I checked the log on JM and saw nothing in it. There was no error message and 9249 port was still alive. To figure out what happened, I created another cluster and I found Prometheus could connect to Flink cluster if there is no running job. After JM triggered or completed the first checkpoint, Prometheus started getting ERR_EMPTY_RESPONSE from JM, but not for TM. There was still no error in log file and 9249 port was still alive. I was wondering where did the error occur. Flink or Prometheus reporter? Or It is incorrect to use Prometheus reporter on Flink 1.3.2 ? Thank you. Best Regards, Tony Wei
