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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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Way to see the method execution using JMC

I have been running Java flight recorder in JMC and trying to determine which method has the low performance. I look under method profile and see list of methods with count and percentage. Is there a way to see execution time of the method? Or are…
perplexedDev
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Run JMC tool rools programmatically

My goal is to write Java class that will analyze jfr dump and give warnings like JMC tool like in attached screenshot. For example: "There are long socket read pauses" or "The JVM was paused for 100 % during ..." etc. I saw an example of…
user9517026
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How can I run Java Mission Control with default service permission to track it?

My app gets excessive RAM usage after a few weeks. Very likely memory leak, not disposed stream etc. It's launched as windows service with default account(SYSTEM). How can I run Java Mission Control with default service permission to track it? If I…
NightCity10932
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How to monitor a WebLogic 12c instance running in JDK8u361 from JMC8.3/JDK17?

I'd like monitor WLS12c/JDK8u361 with JMC, but it needs to be downloaded separately from https://www.oracle.com/java/technologies/javase/products-jmc8-downloads.html . No problem. When using the latest JMC8.3(running on Oracle JDK11+), somehow it's…
Mario.Cadiz
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Java Performance: Where to find Hot Code tab in Java Mission Control 8 have they removed this functionality?

I am exploring the Java Mission Control 8.3 version. In the tutorial to which I am referring, they are using an older version of Java Mission Control 7.X. In the tutorial, they show a "Code Flow" tab that contains a "Hot Methods" section. I am…
User27854
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Java Flight Recorder and JDK Mission Control : Method sampling not including methods of java.nio package?

I suspected a method in my code to be very slow when listing files in a directory containing thousands of files (more than 60s). So I put some logs in my code and it confirmed me that this part was slow. It then used JFR to see if it was correctly…
Olivier Masseau
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Can't build JMC from source

I need to use JMC to read some JFR files. I've tried to download zip's with compiled projects from Oracle and Azul, but it's not work for me. So I decide to build JMC from the source code. I've download source from here. When I clone project I have…
timetocook420
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How HeapMemoryUsagePercent is Calculated in JDK Mission Control (JMC)?

I wrote a program using JMX API to calculate JVM Usage percentage. Code makes use of 2 attributes of java.lang:type=Memory MBean (used and max attribute). When I use the formula (used/max * 100) to calculate JVM Used Memory Percent, it gives me very…
s3-89
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java.security.cert.CertPathValidatorException: validity check failed on JMC 5.5.2

I hope someone could give some tips to fix this potential SSL issue. I am using Oracle JMC5.5.2 bundled with Oracle JDK8u231 and getting this exception when: going to Help > Check for updates or Help > Install New Software ... As a result, this…
Mario.Cadiz
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Times Elapsed method seems missing in JMC 7 (in method profiling)

I'm using JMC tool with JFR to do profiling on Java application. After doing a record, and loading the JFR file, when i go to "Method Profiling", i saw Top package and top class and stack trace associated. In stack trace saw number of metod's call…
David Hassoun
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How to read JFR in JDK 11

I generated a jfr file using Java Flight Recorder and I want to convert that to a flame graph compatible format ( https://github.com/brendangregg/FlameGraph ). Is there any Java classes to read a jfr file. In java 7 we had import…
lakshan karunathilake
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Java Mission Control No JVMs detected Windows 10

I just downloaded Java Mission Control (JMC) for the first time and upon starting JMC, the following popup appears: I am trying to go through the Q&A but I am either not sure how to implement the suggested solutions, or the solutions don't seem to…
bcf
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Record application events on remote Docker from current system using JMC command line options

Basically I would like to record the application events(JFR data) running on docker from my current system JMC. Steps followed: Enabled JFR port on my docker service. Verified whether I'm able to access the docker service's JMS port from my…
Narayana nadiminti
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Java Flight Recorder not reporting all GC events

We have performance build that spawns up our application with the following flags turned on: -XX:+UnlockCommercialFeatures -XX:+FlightRecorder -XX:FlightRecorderOptions=dumponexit=true,dumponexitpath=/tmp/ImaginaryApplication/logs/flightRecorder.jfr…
caffeine_inquisitor
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Unable to start flight recorder via JMC 6 within eclipse oxygen (4.7)

I have an error I don't understand. If I try to to use JFR using the JMC eclipse plugin it fails with the exception com.oracle.jmc.rjmx.services.jfr.FlightRecorderException: Could not start the recording! at…
Christian
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