To Do:

Hadoop

Fix Oozie Server extjs install.
Add hosts.exclude support for decommissioning nodes.
Set default # map/reduce tasks automatically based on facter node stats.
Handle ensure => absent
Implement standalone yarn proxyserver support.
Make log4j.properties more configurable.
Make JMX ports configurable.
Make hadoop-metrics2.properties more configurable.
Support HA automatic failover.
HA NameNode Fencing support.

Zookeeper

Won't implement. A Zookeeper package is available upstream in Debian/Ubuntu. Puppetization for this package can be found at https://github.com/wikimedia/operations-puppet-zookeeper