David Hay

Are you sending messages to your topic without setting a key? I don't know if we ever tested that scenario.

FWIW, this should be fixed by a recent pull request. (https://github.com/HomeAdvisor/Kafdrop/pull/3)

I'm having trouble reproducing this error using the latest master commit. If the key is null, it just displays nothing after the "key" label. Maybe it would help if you...

@doug2525 , what version of Kafka are you using? What version of the client library are you using to consume messages?

FWIW, we've only tested Kafdrop up through version 0.8.2.2. It sounds like there have been some changes to the consumer data structures stored in Zookeeper that Kafdrop doesn't know how...

What version of Java are you using?

The `sun.management` package has gone away with Java 9 and above. I haven't (yet) found an appropriate replacement to using he `sun.management.Agent` class to get the fully resolved JMX properties.