0.23 conf backwardly compatible?

[Petru Dimulescu]

Hello,

I had a simple one-node configuration for 0.20, base of two files,
located in conf/:

core-site.xml :

<configuration>
        <property>
                <name>fs.default.name</name>
                <value>hdfs://192.168.1.107:8999</value>
        </property>
</configuration>

hdfs-site.xml :

<configuration>
   <property>
        <name>dfs.data.dir</name>
        <value>/stuff/hadoop/data</value>
    </property>
    <property>
        <name>dfs.name.dir</name>
        <value>/stuff/hadoop/name</value>
    </property>
</configuration>


If I use the same configuration with 0.23 it doesn't work -- when I
launch "./hdfs namenode" I get the catch-all exception:

java.lang.IllegalArgumentException: Invalid URI for NameNode address
(check fs.defaultFS): file:/// has no authority.

0.23 doc says "Federation configuration is backward compatible and
allows existing single Namenode configuration to work without any
change." 
(http://hadoop.apache.org/common/docs/r0.23.0/hadoop-yarn/hadoop-yarn-site/Federation.html#Federation_Configuration)

 Any idea?