Summary

Remove the System Property jdk.jmx.mbeans.allowNonPublic which was introduced in JDK 8 and was intended to be transitional, being removed in later releases. This removal is long overdue.

Problem

The System Property jdk.jmx.mbeans.allowNonPublic was added with JDK-8010285, to optionally be compatible with a time before JDK-8, when Management Interfaces being public was not enforced.

From JDK-8010285: The system property "jdk.jmx.mbeans.allowNonPublic" is used to revert to the old behaviour allowing non-public management interfaces. This property is considered to be transitional and will be removed in the subsequent releases.

This property is also documented in the JDK 8 Compatibility Guide: https://www.oracle.com/java/technologies/javase/8-compatibility-guide.html

That was a long time ago. This compatibility convenience flag should be removed.

Solution

Remove the code that reads the System Property jdk.jmx.mbeans.allowNonPublic, the conditions related to it, and the tests.

New behaviour will be the same as current behaviour with the property unset.

Specification

No specification change. Property is not documented in the JDK.

Github PR for reference: https://github.com/openjdk/jdk/pull/23098