svn merge -c 1586479 FIXES: MAPREDUCE-5825. Provide diagnostics for reducers killed during ramp down. Contributed by Gera Shegalov


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1586482 13f79535-47bb-0310-9956-ffa450edef68