RFR 8030847: java/lang/management/ThreadMXBean/ThreadBlockedCount.java fails intermittently again

[Jaroslav Bachorik]

Hi,

thanks do David and Staffan it was possible to pinpoint the contention 
to the static initializaton and classloading.

David suggested running the test routine twice to exercise any 
initialization during the first run and performs the checks only for the 
results of the second run.

The test is using Phaser for synchronization. All the potentially 
blocking code (System.out.println(), Thread.currentThread(), etc.) was 
removed from the tested thread.

The webrev is available at 
http://cr.openjdk.java.net/~jbachorik/8030847/webrev.01

Thanks,

-JB-