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List: openjdk-serviceability-dev
Subject: Re: Misleading output from jcmd JFR.check
From: David Holmes <david.holmes () oracle ! com>
Date: 2017-09-06 7:52:14
Message-ID: 28296434-7d68-a45d-e266-f2364d71b373 () oracle ! com
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On 6/09/2017 5:48 PM, Martin Skarsaune wrote:
> Ok, that makes sense.
> Have posted to early access community.
Not really any need now :)
Cheers,
David
> Thanks again
>
> Martin
>
> ons. 6. sep. 2017 kl. 09:38 skrev Martin Skarsaune <martin@skarsaune.net
> <mailto:martin@skarsaune.net>>:
>
> Ah, good point.
>
> I think it should be pretty straightforward to reproduce. I don't
> think it makes much difference what java application runs, but if
> you want to run the exact same application, you can get it here :
>
> https://oss.sonatype.org/content/repositories/public/io/hawt/hawtio-app/1.5.3/hawtio-app-1.5.3.jar
>
> Martin
>
> ons. 6. sep. 2017 kl. 09:15 skrev David Holmes
> <david.holmes@oracle.com <mailto:david.holmes@oracle.com>>:
>
> On 6/09/2017 5:13 PM, Martin Skarsaune wrote:
> > Martins-MacBook-Pro-2:Downloads marska$ java -version
> >
> > java version "9"
> >
> > Java(TM) SE Runtime Environment (build 9+181)
> >
> > Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)
> >
> >
> > Also included in the first message ;-)
>
> It wasn't clear that process 11700 was running the exact same JVM.
>
> Thanks,
> David
>
> >
> > ons. 6. sep. 2017 kl. 09:10 skrev David Holmes
> <david.holmes@oracle.com <mailto:david.holmes@oracle.com>
> > <mailto:david.holmes@oracle.com
> <mailto:david.holmes@oracle.com>>>:
> >
> > Hi Martin,
> >
> > On 6/09/2017 5:00 PM, Martin Skarsaune wrote:
> > > Hi David
> > >
> > > Details below.
> >
> > What does "java -version" show for that JVM please.
> >
> > Thanks,
> > David
> >
> > > Cheers
> > >
> > > Martin
> > >
> > > Martins-MacBook-Pro-2:Downloads marska$
> > >
> /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/bin/*jcmd
> > > 11700 VM.command_line*
> > >
> > > 11700:
> > >
> > > VM Arguments:
> > >
> > > java_command: hawtio-app-1.5.3.jar
> > >
> > > java_class_path (initial): hawtio-app-1.5.3.jar
> > >
> > > Launcher Type: SUN_STANDARD
> > >
> > > Martins-MacBook-Pro-2:Downloads marska$
> > >
> /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/bin/*jcmd
> > > 11700 help*
> > >
> > > 11700:
> > >
> > > The following commands are available:
> > >
> > > JFR.configure
> > >
> > > JFR.stop
> > >
> > > JFR.start
> > >
> > > JFR.dump
> > >
> > > JFR.check
> > >
> > > VM.log
> > >
> > > VM.native_memory
> > >
> > > ManagementAgent.status
> > >
> > > ManagementAgent.stop
> > >
> > > ManagementAgent.start_local
> > >
> > > ManagementAgent.start
> > >
> > > Compiler.directives_clear
> > >
> > > Compiler.directives_remove
> > >
> > > Compiler.directives_add
> > >
> > > Compiler.directives_print
> > >
> > > VM.print_touched_methods
> > >
> > > Compiler.codecache
> > >
> > > Compiler.codelist
> > >
> > > Compiler.queue
> > >
> > > VM.classloader_stats
> > >
> > > Thread.print
> > >
> > > JVMTI.data_dump
> > >
> > > JVMTI.agent_load
> > >
> > > VM.stringtable
> > >
> > > VM.symboltable
> > >
> > > VM.class_hierarchy
> > >
> > > GC.class_stats
> > >
> > > GC.class_histogram
> > >
> > > GC.heap_dump
> > >
> > > GC.finalizer_info
> > >
> > > GC.heap_info
> > >
> > > GC.run_finalization
> > >
> > > GC.run
> > >
> > > VM.info
> > >
> > > VM.uptime
> > >
> > > VM.dynlibs
> > >
> > > VM.set_flag
> > >
> > > VM.flags
> > >
> > > VM.system_properties
> > >
> > > VM.command_line
> > >
> > > VM.version
> > >
> > > help
> > >
> > >
> > > For more information about a specific command use
> 'help <command>'.
> > >
> > > Martins-MacBook-Pro-2:Downloads marska$
> > >
> > >
> > > ons. 6. sep. 2017 kl. 08:53 skrev David Holmes
> > <david.holmes@oracle.com <mailto:david.holmes@oracle.com>
> <mailto:david.holmes@oracle.com <mailto:david.holmes@oracle.com>>
> > > <mailto:david.holmes@oracle.com
> <mailto:david.holmes@oracle.com> <mailto:david.holmes@oracle.com
> <mailto:david.holmes@oracle.com>>>>:
> > >
> > > Hi Martin,
> > >
> > > On 6/09/2017 4:38 PM, Martin Skarsaune wrote:
> > > > Hi
> > > >
> > > > If I run *JFR.check* in build 9+181 , the response
> > indicates that
> > > I can
> > > > invoke *VM.unlock_commercial_features*.
> > > > This command is not available in the given VM.
> > > >
> > > > The output should not refer to this command i
> VM where it
> > is not
> > > available.
> > > >
> > > > Cheers
> > > >
> > > > Martin Skarsaune
> > > >
> > > >
> > > > Example:
> > > >
> > > > Martins-MacBook-Pro-2:Downloads marska$ java
> -version
> > > >
> > > > java version "9"
> > > >
> > > > Java(TM) SE Runtime Environment (build 9+181)
> > > >
> > > > Java HotSpot(TM) 64-Bit Server VM (build 9+181,
> mixed mode)
> > > >
> > > > Martins-MacBook-Pro-2:Downloads marska$
> > > >
> > >
> >
> /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/bin/jcmd
> > 11700
> > > > JFR.check
> > > >
> > > > 11700:
> > >
> > > What JVM is process 11700? What does "jcmd 11700
> help" show?
> > >
> > > Thanks,
> > > David
> > > -----
> > >
> > > > Java Flight Recorder not enabled.
> > > >
> > > >
> > > > Use VM.unlock_commercial_features to enable.
> > > >
> > > >
> > >
> >
>
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