[NTLUG:Discuss] NFS Server Timeout

[George Lass]

      From: Eric Schnoebelen <eric at cirr.com>
 To: NTLUG Discussion List <discuss at ntlug.org> 
 Sent: Wednesday, October 21, 2015 6:27 PM
 Subject: Re: [NTLUG:Discuss] NFS Server Timeout
   
George Lass writes:
- Following a recent power outage that took down my NFS server I am
- no longer able to mount anything on that server, even from a client
- on the same local network.  On the client side the mount returns:
-  mount: RPC: Timed out
- 
- Running tcpdump on the server, I discovered that the mount response
- is not being sent until some 38 seconds after the mount request
- was received.  The client is timing out after 20 seconds.

[...]

- Any ideas?

It sounds like you've got a networking issue, possibly address
lookup, etc.

Tracing the execution of mountd or rpcbind might provide some
insight.

Do you have hostnames in your exports file?

If you are using hostnames, do you have working reverse address
maps?

Do you have working hostname to IP address maps?

--
Eric Schnoebelen        eric at cirr.com        http://www.cirr.com
        Seen on a T-shirt in Pasadena:
            FAILURE IS NOT AN OPTION -
            it comes bundled with the software.


>From a network standpoint, I believe all is well. No firewalls, I can ping the server from the client and vice versa. /etc/exports only contains IPv4 addresses (no hostnames), and running arp on either client or server shows both IP address and hostname for the other.  What I am trying to focus on right now is the fact that there is a 10 second delay running rpcifo -p and showmount -d times out after 20 seconds even when running them on the server itself.  This pretty much rules out any network / name resolution issues.
George
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