The release notes for 0.22 (
>The following features are not supported in Hadoop 0.22.0.
>Latest optimizations of the MapReduce framework introduced in the
Hadoop 0.20.security line of releases.
>JMX-based metrics v2.
By Security missing, what all features are missing? Does it mean Kerberos
integration is missing?
In o.a.h.hdfs.server.datanode.SecureDataNodeStarter.java, the following
code is there
throw new RuntimeException("Cannot start secure datanode in unsecure