CODEWITHSUNDEEP
monitoringjmx
Jonathan L
Jonathan L

Reputation: 10668

Differences between java.rmi.server.hostname and com.sun.management.jmxremote.host

When enabling JMX remote connection, I saw these two properties, java.rmi.server.hostname and com.sun.management.jmxremote.host. What the differences between these two?

Upvotes: 3

Views: 1910

Answers (1)

oᴉɹǝɥɔ
oᴉɹǝɥɔ

Reputation: 2055

The initial connection from the client (e.g. jconsole or visualvm) is established to com.sun.management.jmxremote.host on port com.sun.management.jmxremote.port. Then the connecting client obtains com.sun.management.jmxremote.rmi.port (it is dynamically assigned by Java from a pool of unused ports if not explicitly specified) and further communication and data exchange goes over Java RMI connecting to java.rmi.server.hostname on port com.sun.management.jmxremote.rmi.port.

If you don't use JMX authentication or SSL I'd recommend configuring both hosts as localhost (see configuration example below).

java.rmi.server.hostname=127.0.0.1
com.sun.management.jmxremote
com.sun.management.jmxremote.port=9091
com.sun.management.jmxremote.host=127.0.0.1
com.sun.management.jmxremote.rmi.port=9092
com.sun.management.jmxremote.ssl=false
com.sun.management.jmxremote.authenticate=false

You can connect to such process either from the same machine or via SSH with port forwarding e.g.

ssh user@host -L 9091:localhost:9091 -L 9092:localhost:9092

Upvotes: 3

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