Running JConsole from a previous JDK, and attaching to jdk-23 (after [JDK-8326666](https://bugs.openjdk.org/browse/JDK-8326666): Remove the Java Management Extension (JMX) Subject Delegation feature), the MBean tab is blank.
In javax/management/remote/rmi/RMIConnectionImpl.java: addNotificationListener rejects a non-null delegationSubjects array, but older JDKs will send such an array. It could accept the array, and only reject/throw if it contains a non-null Subject (i.e. if an attempt to use subject delegation is really happening). Manually testing JConsole, the MBean tab is fully populated and usable. ------------- Commit messages: - Remove unnecessary Subject array in RMIConnectionImpl, update docs in RMIConnection - JConsole's MBean tab is blank after JMX Subject Delegation removal. Changes: https://git.openjdk.org/jdk/pull/19253/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19253&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8332303 Stats: 18 lines in 2 files changed: 9 ins; 2 del; 7 mod Patch: https://git.openjdk.org/jdk/pull/19253.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19253/head:pull/19253 PR: https://git.openjdk.org/jdk/pull/19253
