[8u20] request for approval to backport 8029890, 8030847, 8032377: java/lang/management/ThreadMXBean/ThreadBlockedCount.java fails intermittently

[Jaroslav Bachorik]

Hi,

This is a request to backport the following set of related changes:

JDK-8029890
Issue    : https://bugs.openjdk.java.net/browse/JDK-8029890
Changeset: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/cc29c31a7823
Review   : 
http://mail.openjdk.java.net/pipermail/serviceability-dev/2013-December/013612.html

JDK-8030847
Issue    : https://bugs.openjdk.java.net/browse/JDK-8030847
Changeset: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/cc29c31a7823
Review   : 
http://mail.openjdk.java.net/pipermail/serviceability-dev/2013-December/013683.html
 
http://mail.openjdk.java.net/pipermail/serviceability-dev/2014-January/013715.html

JDK-8032377
Issue    : https://bugs.openjdk.java.net/browse/JDK-8032377
Changeset: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/2f3b642d94cb
Review   : 
http://mail.openjdk.java.net/pipermail/serviceability-dev/2014-January/013882.html

All this fixes are about preventing intermittent failures in 
ThreadBlockedCount test. It took more iterations to finally nail down 
the main culprit.

Cheers,

-JB-