- TRY TO RECORD SCRIPT IT NOT SHOWS OPEN FLIGHT APPLICATION HOW TO
- TRY TO RECORD SCRIPT IT NOT SHOWS OPEN FLIGHT APPLICATION LICENSE
Jvm_args: -XX:+UnlockCommercialFeatures -XX:-FlightRecorder $java -XX:+UnlockCommercialFeatures -XX:-FlightRecorder -jar MyApp.jar It is not possible to dynamically create a new flight recording if this option has been specified. $jcmd 40110 JFR.start name=my_recording filename=myrecording.jfr dumponexit=trueĮxample 2-5 Disabling JFR with -XX:-FlightRecorderĮxample 2-5 disables JFR entirely by passing -XX:-FlightRecorder to the java command when the application starts. $jcmd 40110 VM.unlock_commercial_features $ java -XX:-UnlockCommercialFeatures -jar MyApp.jar It then unlocks commercial features with VM.unlock_commercial_features, and starts a new flight recording with JFR.start. $jcmd 39970 JFR.start name=my_recording filename=myrecording.jfr dumponexit=trueĮxample 2-4 Locking Commercial Features with -XX:-UnlockCommercialFeaturesĮxample 2-4 launches the application with commercial features explicitly locked ( -XX:-UnlockCommercialFeatures). $java -XX:+UnlockCommercialFeatures -jar MyApp.jar $jcmd 37152 JFR.start name=my_recording filename=myrecording.jfr dumponexit=trueĮxample 2-3 Using -XX:+UnlockCommercialFeatures with a JFR Dynamic StartĮxample 2-3 starts JFR dynamically (using JFR.start) after the application has been launched with -XX:+UnlockCommercialFeatures. $java -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -jar MyApp.jar Recording: recording=1 name="my_recording" filename="myrecording.jfr" compress=false (running)Įxample 2-2 Using -XX:+UnlockCommercialFeatures and -XX:+FlightRecorderĮxample 2-2 unlocks commercial features and enables JFR by passing options -XX:+UnlockCommercialFeatures and -XX:+FlightRecorder to the java command when the application starts. Use JFR.dump name=my_recording to copy recording data to file. No limit (duration/maxsize/maxage) in use. $jcmd 40019 JFR.start name=my_recording filename=myrecording.jfr dumponexit=true
$jcmd 40019 VM.unlock_commercial_features Use VM.unlock_commercial_features to enable. Once the JVM is running, the jcmd commands VM.unlock_commercial_features and JFR.start are used to unlock commercial features and start a new flight recording. No extra options are provided when the Java application is launched. The following examples show various use cases for running jcmd with Java Flight Recorder, assuming a demo program that lives in MyApp.jar.Įxample 2-1 Dynamic Interaction Using jcmdĮxample 2-1 unlocks commercial features and enables Java Flight Recorder dynamically at runtime. To see a complete list of commands available to a running Java application, specify help as the diagnostic command after the process identifier (or the name of the main class). To see a list of all running Java processes, run the jcmd command without any arguments. Jcmd 5368 JFR.start duration=60s filename=myrecording.jfr To issue a command, you must pass the process identifier of the JVM (or the name of the main class) and the actual command as arguments to jcmd.įor example, to start a 60-second recording on the running Java process with the identifier 5368 and save it to myrecording.jfr in the current directory, use the following: The simplest way to execute a diagnostic command is to use the jcmd tool (located in the Java installation directory). For a more detailed description of Diagnostic Commands, see Appendix A, "Diagnostic Command Reference". It is possible to control recordings using jcmd and JFR-specific diagnostic commands. This chapter explains more advanced ways of running and managing JFR recordings and contains the following sections: For more information about using the JMC client to control JFR, see the Flight Recorder Plug-in section of the Java Mission Control help. This plug-in enables access to JFR functionality through an intuitive GUI. The easiest and most intuitive way to use JFR is through the Flight Recorder plug-in that is integrated into Java Mission Control. This can be confusing but has no other negative implications. This means that if more than one recording is running, you might end up with more information in the recording than you wanted. However, in order to make the internal logic of Java Flight Recorder as streamlined as possible, the resulting recording always contains the union of all events for all recordings active at that time. You can run multiple recordings concurrently and configure each recording using different settings in particular, you can configure different recordings to capture different sets of events.
TRY TO RECORD SCRIPT IT NOT SHOWS OPEN FLIGHT APPLICATION HOW TO
To learn more about commercial features and how to enable them please visit.
TRY TO RECORD SCRIPT IT NOT SHOWS OPEN FLIGHT APPLICATION LICENSE
Java Flight Recorder requires a commercial license for use in production.
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