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Questions tagged [jfr]

JRockit/Java/JDK Flight Recorder (JFR), a performance monitoring and profiling tool

176 questions
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Why is there no average in latency stack traces?

When I open a .jfr file(Java Flight Record) with Java Mission Control, I can find 'Stack Trace', 'Longest' and 'Count' in Thread -> Latencies -> Latency Stack Traces tab. I care about the average but not the longest. There's average in Java…
lamplet
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How to interpret lambda in memory view of Java Mission Control

I'm analysing part of a Java 8 application using Java Mission Control. I'm using Java Mission Control 6.0.0 (the version that comes with Java 9 and 10). In the Memory view, under Java Application I see the following: 87M seems like a lot of memory…
Adam
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java.security.Provider.getService(String, String) Java Monitor Blocked

I have a problem of block java.security.Provider.getService(String, String) in application after few days of working. Here is stack-trace for subethasmtp, but same story on all other threads (IMAP, HTTPS etc...). Java Monitor Blocked at…
Valentin
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Capture a flight recording from JMC/JCMD vs WLDF image capture

I need a Java flight recording to diagnose a performance problem on production Weblogic servers. I'd like to also get the Weblogic events. Is there any difference between starting the flight recording from either Java Mission Control (or in my…
public wireless
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Getting Error while opening jfr file in JMC console

I'm getting too large recording error while trying to open my 60 MB jfr file in JMC console. Please help me on this. Thank you
Mani
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Unable to run Continuous Flight Recorder for Java app running as a service on Windows10

I'm trying to profile a Java application, which is running as a Service in Windows 10(64 bit) using Java flight recorder dumponexit option. During the execution, Windows does create a temporary directory and temporary .jfr file. However, the final…
Amrit
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Java Flight Control - Keep Last N Minutes record data

Can someone let me know in Java Flight Control started via Java Mission Control if it is possible to keep only last N minutes of data under continuous recording? I have gone through this discussion but I am not able to find where I have to pass the…
tuk
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Magnify Y axis in Java Mission Control charts

I recently recorded a Java Flight Recorder (JFR) dump of a java program. When I opened it using Java Mission Control (JMC), I could adjust the X axis but not Y (In many graphs). I tried flipping my screen (ctrl + alt + arrow key) and it worked ;-)…
Eranga Heshan
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Export Java Mission Control recording (jfr) in html report

Is it possible to export JFR recording in html report format ? scenario - I have to start jfr recording on the JVM for the duration of my performance testing. Once the testing is finished, I want to publish the JFR recording in HTML format.
UmeshPathak
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Jrockit Stacktrace

I need to know how to export stack traces from JRockit or atleast expand all traces. Open a jfr file in Oracle JRockit Mission Control Go to Events Tab Click on Stack Traces Is there any way we can expand all the stack traces at once and explore the…
Arjun M
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JMC parser for Java JFR dumps using Jrockit

I got to know that parsing JFR into Java can be done by unsupported parsers like JMC parser using jrockit from this. Also I figured during the flight recording there will be lot of events captured. If I want to retrieve data values from various…
Vithulan
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Getting error while recording JFR

I am trying to record JFR for a java application hosted in tomcat server. I have used following jvm args . -XX:+UnlockCommercialFeatures -XX:+FlightRecorder And i am using following linux command to record the JFR. …
Sophiya
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Weblogic Dump JFR without discarding old ones

I am using weblogic server and was trying to get the JFRs for my Weblogic Server. The command line arguments I use are: -XX:FlightRecorderOptions=defaultrecording=true,dumponexit=true,dumponexitpath=/my/path,repository=/some/path There are 2…
Aswin Murugesh
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How to intercept FlightRecording events ( java )?

Is there a way to intercept FlightRecorder events in order to send them not only into FlightRecording during recording but to another consumer also. Thanks!
SergeZ
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Intellij Failed to activate JFR synchronization

Trying to profile my app locally and it isn't working. It's saying Profiling is not supported on java versions prior to 1.8. If you're using oracle jdk prior to version 11, or hotspot jdk prior to version 1.8.0_252, add the…
Spider
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