This happens about once every 6 days per machine, with disasterous results for my web server, which expects to find a directory containing linux-kernel mail (among others) instead of a text file containing a single message.
Simply umount'ing the file system restores it to working order, which suggests a workaround of stat-ing the mounts and unmounting any that have become files... but I'm unhappy with the kludgeyness of that evasive action.
The mounts are used ALMOST entirely read-only although extremely infreqent writes are more common than the problem. Usually a message at a time is read using its offset out of a huge mbox file. Many of the files run are large, (50 Meg or so) and are freqently growing by append (but that isn't thru NFS.)
I figure it is the automounter or nfsd messing up. Has anyone experienced this or have any better workarounds?
(arl
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