Date: Thu, 03 May 2007 10:55:29 -0400 From: Chuck Swiger <cswiger@mac.com> To: Janos Dohanics <web@3dresearch.com> Cc: freebsd-questions@freebsd.org Subject: Re: NFS server not responding/is alive again Message-ID: <4639F7E1.3010102@mac.com> In-Reply-To: <ik9RsYVj.1178149799.6484140.janos@imap.3dresearch.com> References: <ik9RsYVj.1178149799.6484140.janos@imap.3dresearch.com>
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Hi-- Janos Dohanics wrote: > I have a FreeBSD 4.11 machine which mounts a volume from a Netapp ONTap. > The FreeBSD machine also acts as a Samba PDC. The Samba volumes are in > the NFS-mounted volume. There are about a dozen Win2K workstations on > the network served by the Samba server. > > Lately I have noticed that /var/log/messages is full with entries like: > > ... /kernel: nfs server filer01:/vol/vol0/psa: not responding > ... /kernel: nfs server filer01:/vol/vol0/psa: is alive again > > It seems that the server sometimes is unresponsive for less than a > second, many other times it's unresponsive for a number of seconds (as > many as 8 seconds). In order to proceed, it would help to run a tcpdump between the NFS server and this FreeBSD machine, and take a look at the packets just before one of these errors is logged, and try to correlate with anything else in your logs (ie, a particular Samba client did something or saw an error as a result). Use something like: tcpdump -w packet.dmp -s 0 host filer01 and host localhost ... and read via "tcpdump -r packet.dmp". Note that Samba is going to be happier serving from local disks; it would be better for the clients to mount against filer01 directly than to "forward" a remote filesystem via this NFS->CIFS/SMB bridge... -- -Chuck
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