[CentOS] Help needed with NFS issue

[Ross Walker]

On Apr 18, 2012, at 3:35 PM, Steve Thompson <smt at vgersoft.com> wrote:

> Interesting. It looks like some kind of RPC failure. During the hang, I 
> cannot contact the nfs service via RPC:
> 
> # rpcinfo -t <server> nfs
> rpcinfo: RPC: Timed out
> program 100003 version 0 is not available
> 
> even though it is supposedly available:
> 
> # rpcinfo -p <server>
>    program vers proto   port
>     100000    2   tcp    111  portmapper
>     100000    2   udp    111  portmapper
>     100024    1   udp   1007  status
>     100024    1   tcp   1010  status
>     100021    1   udp  35077  nlockmgr
>     100021    3   udp  35077  nlockmgr
>     100021    4   udp  35077  nlockmgr
>     100021    1   tcp  56622  nlockmgr
>     100021    3   tcp  56622  nlockmgr
>     100021    4   tcp  56622  nlockmgr
>     100011    1   udp   1009  rquotad
>     100011    2   udp   1009  rquotad
>     100011    1   tcp   1012  rquotad
>     100011    2   tcp   1012  rquotad
>     100003    2   udp   2049  nfs
>     100003    3   udp   2049  nfs
>     100003    4   udp   2049  nfs
>     100003    2   tcp   2049  nfs
>     100003    3   tcp   2049  nfs
>     100003    4   tcp   2049  nfs
>     100005    1   udp    605  mountd
>     100005    1   tcp    608  mountd
>     100005    2   udp    605  mountd
>     100005    2   tcp    608  mountd
>     100005    3   udp    605  mountd
>     100005    3   tcp    608  mountd
> 
> However, I can connect to the service via telnet:
> 
> # telnet <server> nfs
> Trying <ipaddr>...
> Connected to <server> (<ipaddr>).
> Escape character is '^]'.
> 
> so the service is running but internally borked in some way.

Is iptables disabled? If not, problem with rules or RPC helper?

What about selinux?

-Ross