0

I'm getting message like "this flight recording has no recording settings events" while recording events for karaf service.

Can any one please help me for this issue. I put the setting in service script under Karaf Arugs: like 

-XX:+UnlockCommercialFeatures
-XX:+FlightRecorder
Bhavesh Odedra
  • 10,990
  • 12
  • 33
  • 58
Brahmakumar M
  • 1,009
  • 1
  • 8
  • 6
  • Do you get this when creating the recording or when trying to view it in JMC? – Klara Jan 20 '15 at 13:22
  • when I am trying to view the JFR file in JMC – Brahmakumar M Jan 21 '15 at 06:26
  • Do you get any other data in the recording, or are the tabs empty? How did you create the recording? – Klara Jan 21 '15 at 09:01
  • We are not getting any recorded information. But the JVM version info is getting published. – Brahmakumar M Jan 21 '15 at 10:05
  • 1
    Are you using a JDK version lower than 7u40? – Klara Jan 22 '15 at 08:59
  • No.. i'm using java version "1.7.0_71" Java(TM) SE Runtime Environment (build 1.7.0_71-b14) Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode) – Brahmakumar M Jan 22 '15 at 09:07
  • In karaf service i'm using java version "1.7.0_71" Java(TM) SE Runtime Environment (build 1.7.0_71-b14) and i'm trying to open the jfr file in in windows and java version "1.7.0_67" Java(TM) SE Runtime Environment (build 1.7.0_67-b01) – Brahmakumar M Jan 22 '15 at 09:18
  • I creating the setting in service script under Karaf_Opts: like -XX:+UnlockCommercialFeatures -XX:+FlightRecorder and i am recording with command "jcmd JFR.start duration=120s filename=myrecording.jfr" – Brahmakumar M Jan 22 '15 at 09:38
  • Potentially this is related to Karaf running as a Windows Service. Can you running it as a normal application and see if it makes any difference, and I will try to hunt down the reason for the service problems. – Klara Jan 22 '15 at 12:19
  • Karaf is running on linux server and i'm trying to recaord the events of karaf using jcmd commands. – Brahmakumar M Jan 23 '15 at 09:01
  • Ah, I see. Could you try adding the following JVM flag to your karaf, and check which flightrecorder output you get: -XX:FlightRecorderOptions=loglevel=info – Klara Jan 23 '15 at 10:19
  • I've now spoken to the people who work on the JFR implementation (I work on JMC). The theory is that your JVM either cannot access, or cannot parse the JDK/lib/jfr/*.jfc files. In the cannot parse case, it might be that the Karaf uses a custom XML parser that is unable to parse the jfc files, so you can try to set this property: -Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl In the cannot access the jfc files case, try running with the loglevel flag in my comment above and see if you get any interesting output. – Klara Jan 26 '15 at 11:47
  • I'm asking the obvious because it's what happened to me to cause the above error. Where does your "java" command point? I ran into this issue, even after installing the latest JDK 1.8 because my "java" command was still pointing to a JRE from before Flight Recorder existed. – Hank Schultz May 07 '15 at 18:21

0 Answers0