Steps to reproduce

1. Stop Tomcat
2. Remove the live folder manually
3. Launch the full live rebuild
4. I get this progression:
   

It displays web-explorer, but the process is currently building odf. Web-explorer is empty.
I can see in the repository that several nodes have been created under odf.
But when it finally displays odf as the current step, all nodes have disappeared (maybe it was only the hash nodes).
Also, web-explorer still displays 0%.