configuring Zookeeper in HBase with IP addresses only

[Pythonner]

Hello,
this is a follow-up of discussion started on twitter with
http://twitter.com/phunt.

I installed HBase 0.20.0 RC2 on Ubuntu server boxes.

If I'm using machines IP in config files (see below), I get the following
error message:

'Could not find my address: xyz in list of ZooKeeper quorum servers' message
(where 'yxz' is a hostname)

my config is:

hbase-env.sh:

export HBASE_MANAGES_ZK=true

hbase-site.xml:

<configuration>

  <property>
    <name>hbase.rootdir</name>
    <value>hdfs://192.168.1.xx:9200/hbase</value>
  </property>

  <property>
    <name>hbase.master</name>
    <value>192.168.1.xx:60000</value>
  </property>

  <property>
    <name>hbase.cluster.distributed</name>
    <value>true</value>
  </property>

</configuration>

from vanilla Ubuntu server install, I removed the 127.0.1.1 line from
/etc/hosts

Is it supposed to work well with IP addresses only?

David