JDK-8332303 : Better JMX interoperability with older JDKs, after removing Subject Delegation
  • Type: Bug
  • Component: core-svc
  • Sub-Component: javax.management
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2024-05-15
  • Updated: 2024-05-27
  • Resolved: 2024-05-24
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JDK 23
23 masterFixed
Related Reports
CSR :  
JDK-8332371 - Better JMX interoperability with older JDKs, after removing Subject Delegation
Relates :  
JDK-8326666 - Remove the Java Management Extension (JMX) Subject Delegation feature
Description
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)
Comments
Changeset: 253508b0 Author: Kevin Walls <kevinw@openjdk.org> Date: 2024-05-24 19:31:20 +0000 URL: https://git.openjdk.org/jdk/commit/253508b03a3de4dab00ed7fb57e9f345d8aed1a4
24-05-2024
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/19253 Date: 2024-05-15 16:59:59 +0000
15-05-2024
JConsole happens to hit this, but we can make interoperability better generally. In javax/management/remote/rmi/RMIConnectionImpl.java: addNotificationListener now 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).
15-05-2024