[8u40] Request for approval: JDK-8049303: Transient network problems cause JMX thread to fail silenty

[shanliang]

Please approve this clean backport of JDK-8049303 to 8u40.

Bug: https://bugs.openjdk.java.net/browse/JDK-8049303
Webrev: http://cr.openjdk.java.net/~sjiang/JDK-8049303/02/
Review thread: 
http://mail.openjdk.java.net/pipermail/serviceability-dev/2014-September/015603.html
Changeset: http://hg.openjdk.java.net/jdk9/dev/jdk/rev/1ebd76247e3e

Thanks,
Shanliang