Running JConsole from a previous JDK, and attaching to jdk-23 (after JDK-8326666: Remove the Java Management Extension (JMX) Subject Delegation feature), the MBean tab is blank.

Running jconsole -debug displays the Exception:

Problem at MBean tree construction
java.lang.UnsupportedOperationException: Subject Delegation has been removed.
at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.addNotificationListeners(RMIConnectionImpl.java:975)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:714)
at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:598)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:844)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:721)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:720)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1575)
at java.rmi/sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:304)
at java.rmi/sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:280)
at java.rmi/sun.rmi.server.UnicastRef.invoke(UnicastRef.java:166)
at jdk.remoteref/jdk.jmx.remote.internal.rmi.PRef.invoke(Unknown Source)
at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl_Stub.addNotificationListeners(RMIConnectionImpl_Stub.java:136)
at java.management.rmi/javax.management.remote.rmi.RMIConnector.addListenersWithSubjects(RMIConnector.java:595)
at java.management.rmi/javax.management.remote.rmi.RMIConnector.addListenerWithSubject(RMIConnector.java:571)
at java.management.rmi/javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.addNotificationListener(RMIConnector.java:1238)
at jdk.jconsole/sun.tools.jconsole.MBeansTab$1.doInBackground(MBeansTab.java:93)
at jdk.jconsole/sun.tools.jconsole.MBeansTab$1.doInBackground(MBeansTab.java:87)
at java.desktop/javax.swing.SwingWorker$1.call(SwingWorker.java:305)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at java.desktop/javax.swing.SwingWorker.run(SwingWorker.java:342)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1570)