f734c5895c
The JVM is free to collect references to variables that no longer participate in a computation. This simple patch adds an operation to the variable 'rdd' to ensure it is not collected early in the test suite's explicit calls to GC.
ref: http://bugs.java.com/view_bug.do?bug_id=6721588
Author: Tim Ellison <t.p.ellison@gmail.com>
Closes #6010 from tellison/master and squashes the following commits:
77d1c8f [Tim Ellison] Defeat early garbage collection of test suite variable by aggressive JVMs
(cherry picked from commit
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