Re: NFS mount fails CentOS5 on FC16 host

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On 10.5.2012 20:44, Bill Davidsen wrote:
Veli-Pekka Kestilä wrote:
On 10.5.2012 0.40, Bill Davidsen wrote:
Ed Greshko wrote:
On 05/09/2012 10:26 PM, Bill Davidsen wrote:
I get a message "rpc.idmapd appears not to be running" when it is running,
and I'm


This is the only machine which stopped working when the NFS server was
updated, and of course it's the internal web server. :-(

I had lot of problems with NFSv4 and CentOS 5.8, you should check that you have latest kernel on 5.8 as that solved some mounting problems. As for the error messages telling rpc.idmapd not running you can safely ignore. The error comes
from the mount.nfs4 trying to read file in var which is not in there.

As how you get rid of the error before RedHat fixes the actual source (just make
the soft link between rpcidmapd and rpc.idmapd)

Adding the link solved the problem, although it's a kludge for sure!
Yeah.
Now to the real error, I had the mounting problems from CentOS 5.8 to CentOS 5.8 with CLIENT running with kernel 2.6.18-308.1.1.el5 mounting didn't work. As I had the older kernel around as this was upgrade from older 5.x release I tried with it and the things worked without a problem. RedHat fixed the problem for me
atleast in kernel 2.6.18-308.4.1.el5.

And there, too, the most recent kernel upgrade made it work (although the warning is still there without the link).

Hope this helps,
-vpk

Looks right, the spurious warning issue is avoided for the moment, and the failure of the mount is fixed (and hopefully added to regression testing and will stay that way). Thanks for the work-around on the warning, I had updated the kernel by the time I saw your message, since I was watching closely for updates.

Good to hear. I didn't bother to fix the error. Only thing which I hated was that I thought first (like you did) that this error was caused by the failure of nfs-mount. But after little bit of searching around I found out it was unrelated. Then I actually managed to find the root cause. I actually thought of upgrading to CentOS6 for a while because of that.

One thing I learned from this is that one can't trust even RH to actually test the core features of the releases in automated way. And that I am really happy to have a test server as it really (even as a virtual machine) saves you from sleepless nights. :)

-vpk


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