hadoop element assumes ubuntu user exists

[Robert Collins]

Current ubuntu cloud images create the ubuntu user at first boot, so any environment tweaks for it need to be done at boot time - e.g. via idempotent os-refresh-config scripts.

[Robert Collins (lifeless)]

specifically this code:
mv $TARGET_ROOT/home/ubuntu/$filename $TARGET_ROOT/$javaPath
cat $TARGET_ROOT/root/.bashrc >> $TARGET_ROOT/home/ubuntu/.bashrc
echo -e "export JAVA_HOME=$javaPath$filename\nexport PATH=\$PATH:$javaPath$filename/bin" >> $TARGET_ROOT/home/ubuntu/.bashrc
echo -e "export JAVA_HOME=$javaPath$filename\nexport PATH=\$PATH:$javaPath$filename/bin" >> $TARGET_ROOT/root/.bashrc
source $TARGET_ROOT/home/ubuntu/.bashrc

will die badly.