Iglulik spontaneously rebooted about 3AM, this is the second time it has done this and Ice, the server which has /mail spool, has also spontaneously booted once.  It appears that 5.7 has some stability issues when NFS file systems are exported.  The machines not exporting file systems have been completely stable.

     I know that the Linux community is doing a lot of work on NFS right now, which is good because NFS in Linux has been buggy forever but not in ways that crash machines but in ways that when a server goes away and comes back the clients do not always recover properly.  There was a lot of work in the 5.7 kernel and they just came out with a new nfs-kernel package.  So hopefully they’ll get this resolved soon.

     So I’ve compiled 5.7.1 now on Iglulik.  If it does not spontaneously boot again before tonight I will be rebooting in the early AM to load the new kernel.