Date: 14 Mar 2011 17:34:22 -0000 From: John Levine <johnl@iecc.com> To: freebsd-questions@freebsd.org Subject: Strange interaction between dump and NFS Message-ID: <20110314173422.57749.qmail@joyce.lan>
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Every day, in my logs I see this on an 8.2-RELEASE server: Mar 14 03:11:14 leila mountd[937]: can't export / Mar 14 03:11:14 leila mountd[937]: bad exports list line / -maproot and, indeed, showmout shows that the root isn't exported and NFS mounts of the exported root filesystem stop working. But if I do a kill -HUP of mountd, the export comes back and resumes working. (The /etc/exports file is fine, and does not change.) What happens at 3:11 AM is that dump starts running on the root file system. I use a -L flag, so that's when it's doing the snapshot, which somehow seems to be confusing the mount daemon. But I also dump /var and /usr a little later, and they don't have this problem. The only difference I can see is that /var and /usr have soft updates, while the root doesn't. Any insight into what the heck is going on? To recap: * All three filesystems are NFS exported and are working normally * Dump starts, nothing should change in NFS, but / export stops working * Poke mountd, / export resumes workng. R's, John
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