From my blog:
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Hello,

seems the Eclipse intergration has a problem in Eclipse 4.5 Mars ... for "Run As" - "JUnit Test with Flight Recorder" in the error log lands
<code>
java.lang.NoSuchMethodError: com.jrockit.mc.ide.launch.model.JFRLaunchModel.getDefaultRecordingFileName(Ljava/lang/String;)Lcom/jrockit/mc/core/MCFile;
at com.jrockit.mc.ide.launch.model.JFRLaunchModel.(JFRLaunchModel.java:71)
at com.jrockit.mc.ide.launch.JFRLaunchShortcutHelper.updateLaunchConfigurationWithJFRSettings(JFRLaunchShortcutHelper.java:28)
at com.jrockit.mc.ide.launch.JFRJUnitLaunchShortcut.createLaunchConfiguration(JFRJUnitLaunchShortcut.java:23)
at org.eclipse.jdt.junit.launcher.JUnitLaunchShortcut.performLaunch(JUnitLaunchShortcut.java:222)
</code>

Anyway, the JMC plugin can be triggered in other ways - so this is not a show stopper!
Merten