Parsing jrockit flight recorder files programmatically

Hi all,
i am trying to develop a small/custom application to process the .jfr files from multiple jrockit JVM (the JRMC is not friendly enough
when processing multiple files and can't automate some typical issue/problem checking)
i refer to the API document here: http://docs.oracle.com/cd/E15289_01/apirefs.40/e26998/com/jrockit/mc/flightrecorder/FlightRecording.html
e.g.
FlightRecording recording = FlightRecording.createFromFile(new File("path_to_recording.jfr"));
//more code below
i add several .jar files in the classpath (jars in folder missioncontrol/plugins) for compilation.
When i try to run the application, i get the following error.
can anybody help to show me how to setup the environment/classpath so as to run an application for reading the .jfr file?
thank you.
Begin task: Starting reading eventsReading chunk
Parsing events
java.lang.ExceptionInInitializerError
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
     at java.lang.Class.newInstance0(Class.java:355)
     at java.lang.Class.newInstance(Class.java:308)
     at com.jrockit.mc.flightrecorder.provider.bcel.BCELUtilities.createEventClassLoader(BCELUtilities.java:37)
     at com.jrockit.mc.flightrecorder.provider.EventType.<clinit>(EventType.java:45)
     at com.jrockit.mc.flightrecorder.provider.Producer.createEventType(Producer.java:99)
     at com.jrockit.mc.flightrecorder.internal.parser.synthetic.EventTypeFactory.create(EventTypeFactory.java:29)
     at com.jrockit.mc.flightrecorder.internal.parser.synthetic.ProducerFactory.create(ProducerFactory.java:135)
     at com.jrockit.mc.flightrecorder.internal.parser.synthetic.ProducerFactory.createProducers(ProducerFactory.java:101)
     at com.jrockit.mc.flightrecorder.internal.parser.binary.MetadataParser.read(MetadataParser.java:37)
     at com.jrockit.mc.flightrecorder.internal.parser.binary.MainParser.read(MainParser.java:70)
     at com.jrockit.mc.flightrecorder.internal.parser.binary.MainParser.read(MainParser.java:49)
     at com.jrockit.mc.flightrecorder.provider.RepositoryBuilder.createRepository(RepositoryBuilder.java:63)
     at com.jrockit.mc.flightrecorder.provider.RepositoryBuilder.build(RepositoryBuilder.java:52)
     at com.jrockit.mc.flightrecorder.internal.JRockitFileProvider.createRepositoryFromFile(JRockitFileProvider.java:26)
     at com.jrockit.mc.flightrecorder.spi.FileProvider.createRepository(FileProvider.java:43)
     at com.jrockit.mc.flightrecorder.FlightRecording.<init>(FlightRecording.java:69)
     at com.jrockit.mc.flightrecorder.FlightRecording.createFromFile(FlightRecording.java:108)
     at test.FileParser.main(FileParser.java:18)
Caused by: java.lang.NullPointerException
     at com.sun.org.apache.bcel.internal.classfile.ClassParser.<init>(ClassParser.java:101)
     at com.jrockit.mc.flightrecorder.provider.bcel.Repository.lookupClass(Repository.java:34)
     at com.jrockit.mc.flightrecorder.provider.bcel.EventClassLoader.<clinit>(EventClassLoader.java:52)
     ... 22 more
Edited by: user12050693 on Nov 15, 2012 1:10 AM

I had the same problem today, so I went deeper and found out that there's a problem in retrieving the resource stream, it can be overridden by loading your class (and all reflected JRockit classes) with class loader like this:
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
public class CorrectedClassLoader extends URLClassLoader {
    public CorrectedClassLoader(URL[] urls, ClassLoader parent) {
        super(urls, parent);
    public CorrectedClassLoader(URL[] urls) {
        super(urls);
    @Override
    public InputStream getResourceAsStream(String name) {
        InputStream is = super.getResourceAsStream(name);
        if (is == null && name.startsWith("/")) {
            name = name.substring(1);
            is = super.getResourceAsStream(name);
        return is;
I don't know why the system class loader won't find the resources with "/" prefix but this solved my problem.

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