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Questions tagged [jmc]

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis.

Java Flight Recorder is a profiling and event collection framework built into the Oracle JDK. It allows Java administrators and developers to gather detailed low level information about how the Java Virtual Machine (JVM) and the Java application are behaving. Java Mission Control is an advanced set of tools that enables efficient and detailed analysis of the extensive of data collected by Java Flight Recorder. The tool chain enables developers and administrators to collect and analyze data from Java applications running locally or deployed in production environments.

http://www.oracle.com/technetwork/java/javaseproducts/mission-control/index.html

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How to use Java Mission Control to monitor a JVM in a remote server?

Is it possible to use JMC to monitor a JVM in a remote server? If so how do i do it? Is there any specific java Flags to be invoked before using that? I tried creating a new JVM connection specifying all the details it asks in the wizard. But when i…
k9yosh
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JMC does not launch on mac osx

I downloaded jdk1.7.0_45.jdk on mac osx 10.7.5 so I could use JMC. It started up once, and I was able to connect to a vm, but after the first time, it just hangs once the splash screen launches. I tried to turn debug with the -debug flag, but don't…
Alper Akture
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JDK Mission Control app is not launching in Mac system

I have installed jmc-8.2.1_osx-aarch64 in my mac OS. Java version used is 11.0.14. I have also installed eclipse in my machine. When I am trying to launch the JDK Mission Control app, its erroring out as , "The JVM shared library…
Eli Johnes
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Java Flight Recorder - Async I/O support

Does JFR support Async I/O? I am using Java Flight Recorder (on HotSpot 1.8.0_144) + Mission Control to profile an app. On the File IO tabs of Mission Control, I see orders of magnitude less "activity" than I expected and that I know to be actually…
cmhteixeira
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Java Flight Recorder is not reporting any File I/O events

One of the advertised features of Java Flight Recorder is the ability to report the file created, read or force in the File I/O tab in JMC 8.1 To test this feature, I created a small application that uses Apache commons-io to copy a large file from…
Samrat
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Is there a C#/.NET equivalent for the JVM's JMC+JFR for continuous profiling in production?

Java Flight Recorder (JFR) coupled with JDK Mission Control provides an excellent platform for continuous/always-on profiling in production. Is there an analogous offering for C#/.NET (Core)? I read about EventCounters but those only seem to be a…
Ziad
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Deobfuscating stacktraces and class/method names in JDK Flight Recorder files

We would like to use the JDK Flight Recorder to let our end users send us profiling data that we could analyze internally using JDK Mission Control. The only problem is that our code is obfuscated which makes stacktraces and events unreadable in i.e…
Billybong
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How to read JFR file?

I am a java application with JFR enable, which generated the attached file I am new to using JFR can so I need help reading the file. I need help reading the file. When did the application start and stopped, how much memory was used, what are the…
Neha
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Java 8 - Unable to attach to VM after process has been up for a few weeks

I have a production environment (RHEL 7, Java 1.8.0_102-b14) with a number of JBoss (EAP 7), Tomcat( 8 ) and standalone processes running. All of our processes have been running since our last release 18 days ago. I'm unable to connect to the JBoss…
beirtipol
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Blocking threads with bitronix

I've an issue with one of our applications. The application is a self-writen Java application that connects through JMS to more than 50 different message queues and consumes messages from those queues. From a functional perspective the processing of…
Tianico
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AttachNotSupportedException when trying to start a JFR recording

I'm receiving AttachNotSupportedException when trying to start a JFR recording. It was working normally, until now. jcmd 3658 JFR.start maxsize=100M filename=jfr_1.jfr dumponexit=true…
hbelmiro
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Connection times using Java Mission Control and Wildfly 8.2

I'm starting to move from visualvm to java mission control. I use wildfly 8.2, which doesn't work with JMC out of the box, but have modified the JMC ini to include the required class path as per my answer in the jboss community…
Martin Cassidy
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Java Mission Control code profiler empty

I'm having a problem using Java Mission Control when the application being profiled sets the XX:MaxJavaStackTraceDepth system property to -1. To reproduce: Fire up a java applciation: java -XX:+UnlockCommercialFeatures -XX:+FlightRecorder…
olafure
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JMC connect to WildFly Windows Service

I am trying to connect with JMC to a WildFly running as service on a Windows8 Machine however when I open up JMC it does not show the running Wildfly only the jvm running the jmc. Is there any special setting to be applied when trying to connect…
erik.c
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Java Flight Recorder -- missing File Write/Read events

I am analyzing java8 JVM-process with Java Mission Control + Flight Recorder. When checking the recording under I/O tab, it says: "Event types 'File Write' 'File Read' are not enabled in this recording" When creating the recording, in the recording…
Rop
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