// The atomic variable to make sure multiple threads with the same runnable
// run only once.
private AtomicBoolean hasAlreadyRun = new AtomicBoolean(false);
Thanks for the patch, Laura Adams. LGTM. +1 I'll get it committed when I get a chance.
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FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #11438 (See https://builds.apache.org/job/Hadoop-trunk-Commit/11438/)
YARN-6284. hasAlreadyRun should be final in (templedf: rev 0a05c5c5989edeba2cffe16e80350245778cefce)
Committed to trunk and branch-2. Congrats on your first patch, Laura Adams!