Specifically under "Fully-Distributed Operation" it tells
you to edit your hbase-site.xml and have something like:
<configuration>
...
<property>
<name>hbase.master</name>
<value>example.org:60000</value>
<description>The host and port that the HBase master runs at.
</description>
</property>
...
</configuration>
Clearly this does not work with ZK.
Also the web site talks about HBase 0.19.x and not 0.20.x
There is no mention of ZK in
http://wiki.apache.org/hadoop/Hbase/HbaseArchitecture
I may have more as I get "back in the groove"
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Jim Kellerman, Powerset (Live Search, Microsoft Corporation)