HDFS-6787. Remove duplicate code in FSDirectory#unprotectedConcat. Contributed by Yi Liu.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615622 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10759. Remove hardcoded JAVA_HEAP_MAX. (Eric Yang)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615700 13f79535-47bb-0310-9956-ffa450edef68
HDFS-6451. NFS should not return NFS3ERR_IO for AccessControlException. Contributed by Abhiraj Butala

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615702 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10759. Remove hardcoded JAVA_HEAP_MAX. (Sam Liu via Eric Yang)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1615707 13f79535-47bb-0310-9956-ffa450edef68