svn merge -c 1573775 FIXES: MAPREDUCE-5773. Provide dedicated MRAppMaster syslog length limit. Contributed by Gera Shegalov


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.4@1573782 13f79535-47bb-0310-9956-ffa450edef68