HADOOP-7896 (on the HA branch) refactored RetryAction from an enum to a class, and also moved the act of sleeping to delay retries from the RetryPolicy implementations into RetryInvocationHandler. RetriableCommand, in the rewritten distcp tool, uses RetryPolicy and associated classes from o.a.h.io.retry. When MAPREDUCE-2765 was merged into the HA branch, RetriableCommand wasn't adjusted accordingly to make use of the new structure of the o.a.h.io.retry classes.
It's probably generally not kosher for RetriableCommand to be using the RetryPolicy classes at all, since they're not really intended to be used except by RetryInvocationHandler. But, regardless, this JIRA aims to make distcp's use of the o.a.h.io.retry classes functional again.