Cloudera Docs

Configure JMX ephemeral ports

Learn more aboutKafka JMX ephermal ports and how to configure them.

Kafka uses two high-numbered ephemeral ports for JMX. These ports are listed when you view netstat -anp information for the Kafka broker process.

  • You can change the number for the first port by adding a command similar to the following to the field Additional Broker Java Options (broker_java_opts) in Cloudera Manager. 
    -Dcom.sun.management.jmxremote.rmi.port=port
  • The JMX_PORT configuration maps to com.sun.management.jmxremote.port by default.

    To access JMX via JConsole, run jconsole ${BROKER_HOST}:9393

  • The second ephemeral port used for JMX communication is implemented for the JRMP protocol and cannot be changed.