[ale] lsof and a hung system

Chuck Payne terrorpup at gmail.com
Mon Oct 19 22:36:10 EDT 2015


Have you tried to clear all nfs mounts then remount to see which one
hanging your system

umount -t nfs -l -a -v

Then

mount -t nfs -a -v

That helps me a lot of with nfs issues.

On Mon, Oct 19, 2015 at 7:33 PM, Lightner, Jeff
<JLightner at dsservices.com> wrote:
> I hate to ask but did you use the force option when trying to unmount the NFS mount?
>
> Have you tried stopping nfs.client?  autofs?  (nfs server if running?)
>
> For what its worth I've seen this kind of hang on a heavily loaded server (used for backups with NFS mounted deduplication appliances)  and have actually seen it clear after a few minutes for brief periods.
>
>
> -----Original Message-----
> From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of DJ-Pfulio
> Sent: Monday, October 19, 2015 6:30 PM
> To: ale at ale.org
> Subject: Re: [ale] lsof and a hung system
>
> On 10/19/2015 06:14 PM, Jim Kinney wrote:
>> So the user notifies me they can do a cd to an nfs mounted directory.
>> I get on and can't do ls -la on /. there's a trio of cat commands that
>> are hung and anything that reads data from the drives basically does
>> nothing. Nothing is running but the load average is 20 and not
>> changing. So I try to kill the cat's and unmount the nfs folder.  No
>> work. Dang! what else is open? run lsof. Nothing happens.
>> I'm expecting all sorts of file system errors when after I press the
>> reset switch. A sync command just hangs. dmesg shows user space
>> applications segfaults all over the the place. So the (very new) user
>> would just run it again. I've got a zombie collection that The Walking
>> Dead would call a "herd".
>>
>
> sync?
> hard?
> nfs v3/v4?
> mount options?
>
>
>
> Zombies?!!?
>
> *
> http://abcnews.go.com/Technology/zombie-bees-found-northeast/story?id=22290433
>
> * http://www.cdc.gov/phpr/zombies.htm - gotta be prepared
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo



-- 
Terror PUP a.k.a
Chuck "PUP" Payne
-----------------------------------------
Discover it! Enjoy it! Share it! openSUSE Linux.
-----------------------------------------
openSUSE -- Terrorpup
openSUSE Ambassador/openSUSE Member
skype,twiiter,identica,friendfeed -- terrorpup
freenode(irc) --terrorpup/lupinstein
Register Linux Userid: 155363

Have you tried SUSE Studio? Need to create a Live CD,  an app you want
to package and distribute , or create your own linux distro. Give SUSE
Studio a try.


More information about the Ale mailing list