<p dir="ltr"><br>
On Oct 19, 2015 6:33 PM, "DJ-Pfulio" <<a href="mailto:DJPfulio@jdpfu.com">DJPfulio@jdpfu.com</a>> wrote:<br>
><br>
> On 10/19/2015 06:14 PM, Jim Kinney wrote:<br>
> > So the user notifies me they can do a cd to an nfs mounted directory. I<br>
> > get on and can't do ls -la on /. there's a trio of cat commands that<br>
> > are hung and anything that reads data from the drives basically does<br>
> > nothing. Nothing is running but the load average is 20 and not<br>
> > changing. So I try to kill the cat's and unmount the nfs folder. No<br>
> > work. Dang! what else is open? run lsof. Nothing happens.<br>
> > I'm expecting all sorts of file system errors when after I press the<br>
> > reset switch. A sync command just hangs. dmesg shows user space<br>
> > applications segfaults all over the the place. So the (very new) user<br>
> > would just run it again. I've got a zombie collection that The Walking<br>
> > Dead would call a "herd".<br>
> ><br>
><br>
> sync?<br>
Yep<br>
> hard?<br>
Yep<br>
> nfs v3/v4?<br>
4<br>
> mount options?<br>
Just read/write sizes</p>
<p dir="ltr">Other system with same nfs mounted storage is fine. Storage server is connected to both number crunchers by dedicated, unswitched 10Gbps fiber ethernet. <br>
><br>
><br>
><br>
> Zombies?!!?<br>
A total of 10 zombie processes. All were running code from and data writes to the nfs mounted space.<br>
><br>
> *<br>
> <a href="http://abcnews.go.com/Technology/zombie-bees-found-northeast/story?id=22290433">http://abcnews.go.com/Technology/zombie-bees-found-northeast/story?id=22290433</a><br>
><br>
> * <a href="http://www.cdc.gov/phpr/zombies.htm">http://www.cdc.gov/phpr/zombies.htm</a> - gotta be prepared<br>
><br>
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