Issue with creating a JFR recording

[mbazos]

@skarsaune Thanks for creating this plugin for Jolokia. I was getting it setup with the versions you stated but when I start a JFR recoding via eclipse I get the following exception. I am not sure what I did wrong or if I have the incorrect/incompatible versions but I am using

Jolokia JVM agent is 1.7.2
Eclipse + JMC - 8.1

I am able start the JMX console but I am unable to do a flight recoding I get this error in Eclipse JFR when I attempt to start a recording:

java.lang.RuntimeException: java.lang.ClassCastException: class org.json.simple.JSONArray cannot be cast to class [Ljavax.management.openmbean.CompositeData; (org.json.simple.JSONArray is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @6cddafb6; [Ljavax.management.openmbean.CompositeData; is in module java.management of loader 'bootstrap')
	at org.openjdk.jmc.ui.wizards.WizardAdapterFactory.getAdapter(WizardAdapterFactory.java:47)
	at org.eclipse.core.internal.adapter.AdapterFactoryProxy.lambda$5(AdapterFactoryProxy.java:111)
	at java.base/java.util.Optional.map(Optional.java:260)
	at org.eclipse.core.internal.adapter.AdapterFactoryProxy.getAdapter(AdapterFactoryProxy.java:111)
	at org.eclipse.core.internal.runtime.AdapterManager.lambda$7(AdapterManager.java:248)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1685)
	at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:129)
	at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:527)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:647)
	at org.eclipse.core.internal.runtime.AdapterManager.getAdapter(AdapterManager.java:261)
	at org.openjdk.jmc.ui.common.util.AdapterUtil.getAdapter(AdapterUtil.java:79)
	at org.openjdk.jmc.browser.wizards.ActionWizardPage.getNextPage(ActionWizardPage.java:132)
	at org.eclipse.jface.wizard.WizardDialog.nextPressed(WizardDialog.java:915)
	at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:469)
	at org.eclipse.jface.dialogs.Dialog.lambda$0(Dialog.java:619)
	at org.eclipse.swt.events.SelectionListener$1.widgetSelected(SelectionListener.java:84)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4646)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4413)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3989)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:823)
	at org.eclipse.jface.window.Window.open(Window.java:799)
	at org.openjdk.jmc.ui.misc.DialogToolkit.openWizardWithHelp(DialogToolkit.java:176)
	at org.openjdk.jmc.browser.wizards.ConnectionWizard.openConnectWizard(ConnectionWizard.java:81)
	at org.openjdk.jmc.browser.wizards.OpenConnectionWizardHandler.execute(OpenConnectionWizardHandler.java:46)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:283)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:97)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:300)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:234)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:485)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:438)
	at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:449)
	at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.lambda$2(AbstractContributionItem.java:475)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4646)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1547)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1532)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1325)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4413)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3989)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:342)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:645)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:342)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:552)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:171)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
Caused by: java.lang.ClassCastException: class org.json.simple.JSONArray cannot be cast to class [Ljavax.management.openmbean.CompositeData; (org.json.simple.JSONArray is in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @6cddafb6; [Ljavax.management.openmbean.CompositeData; is in module java.management of loader 'bootstrap')
	at org.openjdk.jmc.rjmx.services.jfr.internal.FlightRecorderServiceV2.getAvailableRecordings(FlightRecorderServiceV2.java:297)
	at org.openjdk.jmc.flightrecorder.controlpanel.ui.wizards.RecordingWizardModel.getDescriptors(RecordingWizardModel.java:320)
	at org.openjdk.jmc.flightrecorder.controlpanel.ui.wizards.RecordingWizardModel.findUniqueName(RecordingWizardModel.java:287)
	at org.openjdk.jmc.flightrecorder.controlpanel.ui.wizards.RecordingWizardModel.<init>(RecordingWizardModel.java:164)
	at org.openjdk.jmc.flightrecorder.controlpanel.ui.actions.StartRecordingAction.doCreateWizard(StartRecordingAction.java:68)
	at org.openjdk.jmc.ui.wizards.AbstractWizardUserAction.createWizard(AbstractWizardUserAction.java:65)
	at org.openjdk.jmc.ui.wizards.WizardAdapterFactory.getAdapter(WizardAdapterFactory.java:45)
	... 76 more

Any information on this would be helpful.

[skarsaune]

Hey @mbazos :-) . I might have seen this one before, but I struggle a little bit to remember what. To be honest this side project is lagging a bit behind, and I´m struggling to keep up with a busy "day job". In the meantime you could try to build Java mission control from this branch and see whether it works better: https://github.com/skarsaune/jmc/tree/jolokia-support
I do have an open PR for mission control, but I struggle with some test pipeline issues, that I focus on fixing first. It is no problem to build and run it though.

[mbazos]

Thanks @skarsaune I will give that a try.

[mbazos]

@skarsaune finally got the build working for jmc and in fact that branch does work and I am able to record a a JFR recording. For anyone else seeing this to get this to work with JMC you need to use this modified branch:

https://github.com/skarsaune/jmc/tree/jolokia-support

Once built you can run an app using Jolokia in my case I used the Java Agent 1.7.0 and once JMC started up created a new connection using the following:
service:jmx:jolokia://127.0.0.1:7777/jolokia/

While this does work and is pretty awsome, JMC 9.x is pretty out of date and I wonder if there is anyway to get this working with the latest version of JMC that's built from the mainline sources (not a forked branch). I will let the Jolokia team know this works not sure if they could take a look at your commits to help with support for JFR & JMC in general.

Thanks for the help @skarsaune

[skarsaune]

Great find @mbazos . Now I can look a bit on both jolokia and jmc for where the solution lies.