YARN-2857. ConcurrentModificationException in ContainerLogAppender. Contributed by Mohammad Kamrul Islam
(cherry picked from commit f2fe8a800e5b0f3875931adba9ae20c6a95aa4ff)
HADOOP-11257. Update "hadoop jar" documentation to warn against using it for launching yarn jars (iwasakims via cmccabe)
(cherry picked from commit 10c98aed38430df5a18899b098c34f5874a798d4)
Revert HADOOP-11257 because it didn't get a jenkins run yet