Virtuoso のライセンスと nscd

なぜか, nscd が止まっていると Virtuoso のライセンスを取得できない...

$ strmin 
*WARNING* voInit failed to find the passwd entry for (null), using '/tmp' for a home directory.
The most likely cause of this problem is the failure of NIS lookups.
Please contact your system administrator.
*WARNING* voInit failed to get the current user's login name, setting user to unknown.
*ERROR* License "111" could not be checked out.
...

nscd を起動したら, このエラーが解決された. なぜだろう...