JFR Streaming: Do not take stacktraces for thread state events #384
Description
JFR events jdk.ThreadSleep, jdk.ThreadPark, jdk.JavaMonitorEnter, jdk.JavaMonitorWait used for exact thread state monitoring currently come with stacktrace. Since the stacktrace is not needed for thread state monitoring, they can be omitted. This will lower the monitoring overhead and also lower the number of transferred bytes between VisualVM and monitored application.