NFS locking requirement
Urchin configuration, which uses data files located in the 'data/conf' folder of the installation, will set read and write locks during setup and administration. If the data/conf folder is mounted over NFS, it is required that the NFS server is running the appropriate locking daemons to handle remote locking.
If the locking does not work properly, the Urchin installation may hang indefinitely.
Technical Notes: Urchin uses the fcntl() function on UNIX to perform advisory and exclusive (read/write) locking. Some older systems may not support all of the rpc locking requests of different platforms. Be sure you are running recent versions of your OS with the latest patches. Make sure that the NFS server is running 'statd' and 'lockd' or equivalent.