Bug report

For bug reports, provide this information, please:

What Debezium connector do you use and what version?

Debezium Server with PostgreSQL and Mongo version 2.7.0

What is the connector configuration?

Environment variable `JMX_EXPORTER_PORT=9799`

What is the captured database version and mode of depoyment?

on-premises, PostgreSQL

What behaviour do you expect?

Kafka producer metrics to show up in prometheus exporter

What behaviour do you see?

kafka producer metrics are missing

Do you see the same behaviour using the latest relesead Debezium version?

Yes

Do you have the connector logs, ideally from start till finish?

```

$ curl -s localhost:9799 | grep '^# HELP kafka'

```

How to reproduce the issue using our tutorial deployment?

Set environment variable `JMX_EXPORTER_PORT=9799`

Feature request or enhancement

For feature requests or enhancements, provide this information, please:

Implementation ideas (optional)

Pull Request: https://github.com/debezium/debezium-server/pull/106