How to enable remote JMX on Kafka brokers (for JmxTool)?

Question

I enabled JMX on Kafka brokers by adding

KAFKA_JMX_OPTS="-Dcom.sun.management.jmxremote=true                 -Dcom.sun.management.jmxremote.authenticate=false                 -Dcom.sun.management.jmxremote.ssl=false                 -Djava.rmi.server.hostname=<server_IP>                 -Djava.net.preferIPv4Stack=true" 

However, when I use kafka.tools.JmxTool to get the JMX metrics, it outputs Unix timestamps only. Why?

./bin/kafka-run-class.sh kafka.tools.JmxTool \   --object-name 'kafka.server:type=BrokerTopicMetrics,name=AllTopicsMessagesInPerSec' \   --jmx-url "service:jmx:rmi:///jndi/rmi://<server_IP>:9111/jmxrmi" 

How can I have it print out the metrics?

Answer 1

Edit bin/kafka-run-class.sh and set KAFKA_JMX_OPTS variable

KAFKA_JMX_OPTS="-Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=your.kafka.broker.hostname -Djava.net.preferIPv4Stack=true" 

Update bin/kafka-server-start.sh add the below line

export JMX_PORT=PORT