NFS server not responding

[bond007]

Hi All,

My cliets are getting disconnected from the NFS server inermittently.

I do see the following error in syslog

vmunix: NFS server not responding still trying

What could be issue, i have checked network connection related thing, all are alright.

pls give your inputs

Thanks and regards,

Bond

[Muthukumar_5]

NFS server on is not running. Login into that machine check syslog.log or dmesg related informations.

# /sbin/init.d/nfs.server stop
# /sbin/init.d/nfs.server start

# /sbin/init.d/nfs.core stop
# /sbin/init.d/nfs.core start

will help to restart NFS server.

--
Muthu

[Arunvijai_4]

Hello,

This is due to NFS server is not reachable or not responding. You need to restart NFS server by,

# /sbin/init.d/nfs.server stop
# /sbin/init.d/nfs.server start

# /sbin/init.d/nfs.core stop
# /sbin/init.d/nfs.core start

-Arun

[RAC_1 · Accepted solution]

You may have network issues?? Is server available all the time?? A continuous ping to server may give some information.
From client, check
ping
nslookup (on ip and on host name)

[Muthukumar_5]

Refer the threads in,

http://www2.itrc.hp.com/service/james/search.do?searchtext=NFS+server+not+responding&submit.x=0&submit.y=0&hpl=1&todo=search&searchcriteria=allwords&from=forums&searchcategory=ALL&rn=25&presort=rank&source=7000&esc=us.support.itrc.hp.com&wpa=forums1.itrc.hp.com%3A80&origin=0&chkServStor=on

for more knowledge and details.

--
Muthu

[Senthil Prabu.S_1]

Hi Chan,
A simpe idea, but looks funny. If is not a production machine, and you can reboot the machine. Then please reboot the machine.

This have helped me many times, when I faced the same problem. This also saves your time for
debugging without reboot.


note:
You can assign zero points, if this is a stupid answer,but I guess this will definetly help you.


HTH,
Prabu.S

[Senthil Prabu.S_1]

I mean to say, give init 6 on the NFS client machine.

[Muthukumar_5]

Prabhu,

What is the needed to reboot the NFS client when the problem is with NFS Server?

Bond,

May be you can restart NFS client in client side as,

# /sbin/init.d/nfs.client stop
# /sbin/init.d/nfs.client start

--
Muthu

[Sivakumar TS]

Hi Bond,

Apart from this pls check the speed of LAN card on both NFS server and NFS client have 100Full Duplex and check if the cable/switch in capable of this.

Regards,

Siva

[Sivakumar TS]

Also look for the valus NUM_NFSD into /etc/rc.config.d/nfsconf

may be it that needs to be increased.


Siva

[Senthil Prabu.S_1]

Muthukumar,
I guess, the error message is coming on the NFS client. So, I suggested the clients to be rebooted.

What you see strange in this..:-)

[Senthil Kumar .A_1]

Hi,

I hope you have done basic troubleshooting such as ping,nslookup and rpc related checks.Try analyzing "nfsstat" outputs.

If still you contend Network is not the cause, try installing the latest patches both on NFS Client and NFS server.


"lan driver" patch, "ARPA Transport patch, and "NFS megapatch" for your release.

You will be able to download the patches at http://itrc.hp.com


Regards,
Senthil Kumar .A

[Senthil Kumar .A_1]

Hi again,

Try this doc..

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000079998580


Regards,
Senthil Kumar .A

[Sivakumar TS]

Hi Bond,

Also you can use #netstat on the server to check whether tcp and udp packets has any collision,etc.

Regards,

Siva.

[Johnny Damtoft]

Hi Bond,

It seems that your NFS is getting disconnected. Have your checked posible network problems?

I would start looking at the LAN speed and duplex. We have setup all of our servers and network switches to 100 mbit, full duplex (static)

Check the docs here:
http://docs.hp.com/en/J4254-90003/ch01s03.html

Don't forget to set it at both ends, the server and switch needs to have the same setting.

NB. Not trust auto-negotiation.


// Johnny

[skt_skt]

check the entries in /etc/rc.config.d/nfsconf for both NFS_CLIENT and NFS_SERVER on both server and client side and bounce the nfs server/client services