I have not had any progress on this personally, but we have sent live-cores to Sun-Japan, and well as all other details they requested.
However, as a work around, the NOC staff is re-mounting the NFS mounts once a day. One server at a time. This has prevented the issue from happening. We still see the log entries, the full hang of NFS mounts has not happened, so far. If more information is required, I can ask NOC to leave one server out of remounting, and run snoop or whatever is required until NFS stalls. -- Jorgen Lundman | <lundman at lundman.net> Unix Administrator | +81 (0)3 -5456-2687 ext 1017 (work) Shibuya-ku, Tokyo | +81 (0)90-5578-8500 (cell) Japan | +81 (0)3 -3375-1767 (home)