Arvo v 1.7.4 is shipped with HDP 2.1, but is not supported.
The following Apache Components are shipped as part of HDP 2.1 HDFS, but are not supported:
NameNode Federation (HDFS-1052)
viewFS (HADOOP-7257)
The following Apache components are shipped as part of HDP 2.1 YARN, but are not supported:
MapReduce v1 Fair Scheduler (HADOOP-3746)
YARN Fair Scheduler (MAPREDUCE-3451)
MapReduce Uber AM (MAPREDUCE-2405)
MapReduce Eclipse Plugin (for Non-Kerberos and Kerberos cluster)
Cgroup resource isolation (YARN-3)
CPU Scheduling (YARN-2)
