Cannot connect to a local JVM with JMC - unexpected IP in error message

Silver QUETTIER

Hello,

I'm struggling to connect to a local JVM with the JMX Console invoked by JMC.

The local app I want to monitor is launched by the following command:

java -Xms1024m -Xmx1024m -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.port=7091 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -cp %classpath% my.fully.qualified.ClassName

The JVM is discovered by JMC under local processes.

Connecting through the detected process results in the following:

Could not connect to [1.8.0_162] my.fully.qualified.ClassName (9100) : Connection refused to host: 192.168.56.1; nested exception is:

java.net.ConnectException: Connection timed out: connect

Could not connect to [1.8.0_162] my.fully.qualified.ClassName (9100). Make sure the JVM is running and that you are using the correct protocol in the Service URL (service:jmx:rmi://127.0.0.1/stub/rO0ABXNyAC5qYXZheC5tYW5hZ2VtZW50LnJlbW90ZS5ybWkuUk1JU2VydmVySW1wbF9TdHViAAAAAAAAAAICAAB4cgAaamF2YS5ybWkuc2VydmVyLlJlbW90ZVN0dWLp/tzJi+FlGgIAAHhyABxqYXZhLnJtaS5zZXJ2ZXIuUmVtb3RlT2JqZWN002G0kQxhMx4DAAB4cHc3AAtVbmljYXN0UmVmMgAADDE5Mi4xNjguNTYuMQAAz7k5I+/bmeEL9Opvhf8AAAFjaWMcfIACAHg=).

Connecting through a custom connection to localhost:7091 results in the following:

Could not connect to localhost : Connection refused to host: 192.168.56.1; nested exception is:

java.net.ConnectException: Connection timed out: connect

Could not connect to localhost. Make sure the JVM is running and that you are using the correct protocol in the Service URL (service:jmx:rmi:///jndi/rmi://localhost:7091/jmxrmi).

I have no idea what is going wrong, or from where the 192.168.56.1 host comes from.

Any ideas?

Hirt-Oracle

Looks like your rmi hostname binds to 192.168.56.1. Try setting it explicitly (on the server) using the java.rmi.server.hostname system property (to what the client would be expected to use to find the server).

Hirt-Oracle

Looks like your rmi hostname binds to 192.168.56.1. Try setting it explicitly (on the server) using the java.rmi.server.hostname system property (to what the client would be expected to use to find the server).

Silver QUETTIER

I have no idea why it would do that. Nevertheless, it worked. Thanks.