pentaho/marketplace-metadata — pull request #213 by mattyb149 (2014-10-31 17:42:31+00:00)
Title: Added PDI ZooKeeper Input/Output steps

Basically just give it the path to read from (in ZooKeeper Input) or the path to write to (in ZooKeeper Output) and the field name containing the data (or in which to put the data). There's also a nice ZooKeeper viewer available in the Tools drop-down menu under Manage ZooKeeper.