How to monitor Kafka broker using jmxtrans

Kafka 0.8.1.1 (kafka_2.8.0-0.8.1.1.tgz)

I am using jmxtrans to do JMX monitoring of a Kafka instance (which is running in docker). Unfortunately, kafka metrics are not being returned.

I have tried a few things to debug this and know that kafka is running correctly (I can produce/consume messages successfully) have concluded that jmxtrans does return JMX metrics (for example, java.lang:type=Memory, attribute=HeapMemoryUsage returns correct data) so the general kafka and JMX capability seems to be working. Also, I can access the metrics when I use jconsole — the metrics seem to be captured with data in all relevant fields.

When I try jmxtrans using the following configuration, unfortunately, I do not get any information back (no data at all in fact). I believe the metrics are supposed to be captured based upon the kafka documentation ("kafka.server:type=BrokerTopicMetrics", attribute="MessagesInPerSec")

The following is the jmxtrans configuration that I used:

{
    "servers" : [ {
        "port" : "9999",
        "host" : "10.0.1.201",
        "queries" : [ {
            "outputWriters" : [ {
                "@class" : "com.googlecode.jmxtrans.model.output.StdOutWriter",
                "settings" : {
                 }
             } ],
             "obj" : "kafka.server:type=BrokerTopicMetrics",
             "attr" : [ "MessagesInPerSec" ]
         } ],
         "numQueryThreads" : 2
     } ]
}

I am not sure why data is not returned. Maybe I setup an invalid jmxtrans configuration or perhaps I am specifying the metric improperly.

Any help is appreciated.