svn merge -c 1489012 FIXES: MAPREDUCE-5268. Improve history server startup performance. Contributed by Karthik Kambatla


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489015 13f79535-47bb-0310-9956-ffa450edef68
Merge -r 1489059:1489060 from trunk to branch-2. Fixes: MAPREDUCE-5036. Default shuffle handler port should not be 8080. Contributed by Sandy Ryza.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489061 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-YARN-474-branch-2-gd