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I am using spring tool suite with the java mission control plugin to start an app which I would like to monitor using the JFR. I added -XX:+UnlockCommercialFeatures -XX:+FlightRecorder to the SpringToolSuite4.ini and additionally set JAVA_OPTS with those two flags (both of which is not necessary if I understand it correctly) and -XX:+FlightRecorder in Run configurations > Arguments > VM arguments of the application to be monitored. When adding both flags as well to the run configuration the application cannot be started with the openJdk.

After starting the application in the JVM Browser when selecting the Flight Recorder I get the following exception.

java.lang.RuntimeException: Flight Recorder features are not enabled. To enable this you need to use a Java 7u4 or later JVM started with -XX:+UnlockCommercialFeatures -XX:+FlightRecorder.
    at com.oracle.jmc.flightrecorder.controlpanel.ui.FlightRecorderProvider.refresh(FlightRecorderProvider.java:105)
    at com.oracle.jmc.browser.views.JVMBrowserView$1.run(JVMBrowserView.java:98)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
    at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: com.oracle.jmc.rjmx.services.jfr.FlightRecorderException: Flight Recorder features are not enabled. To enable this you need to use a Java 7u4 or later JVM started with -XX:+UnlockCommercialFeatures -XX:+FlightRecorder.
    at com.oracle.jmc.flightrecorder.controlpanel.ui.FlightRecorderProvider.getService(FlightRecorderProvider.java:161)
    at com.oracle.jmc.flightrecorder.controlpanel.ui.FlightRecorderProvider.refreshRecordings(FlightRecorderProvider.java:117)
    at com.oracle.jmc.flightrecorder.controlpanel.ui.FlightRecorderProvider.refresh(FlightRecorderProvider.java:94)
    ... 7 more

I tried it with the following java versions.

$ java -version
openjdk version "11.0.2" 2018-10-16
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.2+7)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.2+7, mixed mode)

or with the JDK from oracle

$ java -version
java version "11.0.2" 2019-01-15 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.2+9-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.2+9-LTS, mixed mode)

For none of the above mentioned JDK's there is a jmc.exe which was there with java 8. Is that part of the plugin?

How can I get this running?

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1 回答 1

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IIRC，Java 11 需要 JMC 7 才能启动和查看记录。JMC 7 EA 版本预计很快就会出现在这里 - https://jdk.java.net/jmc/

同时您可以自己构建 JMC，请参阅http://hg.openjdk.java.net/jmc/jmc7/（或 github，不确定它同步到哪个版本 - https://github.com/JDKMissionControl/ jmc ) 和关于如何构建的自述文件。

您可以使用 JVM 命令行标志和 jcmd 开始记录，并使用https://docs.oracle.com/en/java/javase/11/docs/api/jdk.jfr/jdk/jfr/consumer解析记录/package-summary.html

于 2019-03-12T08:22:16.733 回答