This will impact the application performance to a certain extent. Important Note: Enabling JMX Port on the application introduces additional overhead on the JVM as the RMI Registry, RMI Server, Instrumentation and communication with the Client (JVisualVM) to exchange statistical information is part of the same JVM process. We can also set the same port for both .rmi.port and .port This predefined port can be configured in the Firewall. JDK 7 and above, provides a way to overcome this, by providing an option to set an additional system property, which will force the RMI server to open a predefined port instead of a Random generated Port. You might not be able to connect to the java application from JConsole or JVisualVM, if this Firewall setting is done. Some of the datacenter and corporate network firewall prevents connectivity to the Random Ports due to security reasons. The stub is acquired from the RMI registry. The JVM generates another random port for the RMI Server, which JVM client (in our case JVisualVM) uses to communicate via the stub with the JVM to get the Instrumentation objects. The port mentioned in - .port= is the RMI registry port. You can also generate a thread dump and memory dump on the remote machine from JVisualVM when connected through the JMX Remote port. We can use JVisualVM to connect to the remote machine and view the CPU utilization, memory sampling, threads, etc. We can enable the JMX Remote ports by adding the following system parameters while starting the java application.
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