HDFS-4426. Secondary namenode shuts down immediately after startup. (Arpit Agarwal via suresh)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23.6@1439463 13f79535-47bb-0310-9956-ffa450edef68
YARN-354. WebAppProxyServer exits immediately after startup (Liang Xie via jlowe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23.6@1439467 13f79535-47bb-0310-9956-ffa450edef68