ZooKeeper method calls must handle recoverable exceptions

[Randgalt]

Every ZooKeeper method call can potentially throw several Exceptions (lost connection, etc.). The methods must be then be retried. See the ZK FAQ: http://wiki.apache.org/hadoop/ZooKeeper/FAQ

[Randgalt]

Consider using the Curator-Framework. It transparently wraps all ZK method calls in retries.