Ok, great I’d like to try the trunk, I got and compiled “common” and “hdfs” 
as follows but I can’t get it to startup ("NoClassDefFoundError" see below). 
Am I missing something?

  svn co http://svn.apache.org/repos/asf/hadoop/hdfs/trunk
  svn co http://svn.apache.org/repos/asf/hadoop/common/trunk
  cd ….
  export ANT_HOME=/usr/share/ant
  export JAVA_HOME=/opt/java/jdk1.6.0_10-i586
  export PATH=$JAVA_HOME/bin:$PATH
  ant -l build-compile.log \
      -Dforrest.home=/usr/local/src/apache-forrest-0.8 \
      -Djava5.home=/opt/java/jdk1.5.0_22-i586 \
      package

Then I copied everything
  from: /usr/local/src/hadoop/common/trunk/build/hadoop-hdfs-0.22.0-SNAPSHOT/*
  and:   /usr/local/src/hadoop/hdfs/trunk/build/hadoop-core-0.22.0-SNAPSHOT/*
  to:  /opt/hadoop/0.22-SNAPSHOT/

When I run start-dfs.sh I get “java.lang.NoClassDefFoundError” errors:

  [r...@amiller-e6400 ~]# start-dfs.sh
  starting namenode, logging to 
/opt/hadoop/0.22.0-SNAPSHOT/logs/hadoop-root-namenode-localhost.out
  localhost: starting datanode, logging to 
/opt/hadoop/0.22.0-SNAPSHOT/logs/hadoop-root-datanode-localhost.out
  localhost: Exception in thread "main" java.lang.NoClassDefFoundError: 
org/apache/hadoop/hdfs/server/datanode/DataNode
  localhost: Caused by: java.lang.ClassNotFoundException: 
org.apache.hadoop.hdfs.server.datanode.DataNode

Regards,
Alan

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