[mythtv-users] Incomming WAF Problem: NFS "Crashing" on Jaunty

[Steve Heistand]

On Fri, 5 Jun 2009 13:29:25 -0500, Douglas Wagner wrote
> Ok, so I've got 3 days to figure this one out before my WAF goes to the
> tubes.
> 
> Been using Myth for a few years now.  A year or two ago I came across
> mythbuntu and was pretty impressed so I installed 8.04.  Last week, due to
> wanting some better tools, and a successful upgrade of my ubuntu desktop at
> work, I decided to upgrade to mythbuntu 9.04 Jaunty.
> 
> Did a double network upgrade (8.04 -> 8.10 -> 9.04).  The upgrade got hung
> up in the 8.10 ->9.04 side with some symbolic links to NFS shares and didn't
> install correctly.  Removing and adding a few packages (basically a readd of
> the mythbuntu consolidated package) fixed the issue and has the machine up
> and running.
> 
> Now, however, i'm facing a rather large issue.  I have all of my video
> shares (other than a small 250GB drive in the Myth Box that gets the initial
> recording) on NFS Shares shared from my NAS Box.  At this point,it seems
> that periodically (at MOST every 24 hours but I'm guessing it's only taking
> a few hours) my Myth box looses NFS connectivity, to the point where it
> cannot see any of my NFS shares anymore.  At this point the mythfrontend
> goes into a "hung up" state when attempting to access the recording or video
> section (the stuff on the nas is symbolic linked through NFS to LOOK like
> files on the local system.  Yes, I know this is so Myth 0.19 and there's
> other ways to do this now).
> 
> The root cause seems to be myth being unable to read from NFS.  I can
> unmount but not remount the NFS shares.  Restarting NFS-COMMON doesn't seem
> to help.
> 
> I CANNOT have this box having to be rebooted every few hours to make it
> useful.  Anyone have any ideas what the heck is going on?  Rebooting the
> myth box brings the NFS shares back with no problems at all.  Last night I
> restarted the NAS box and did a remount of everything and all was in good
> shape...so it seems I can "fix" it from either end.
> 
> I can tell it's not the NAS system, because I have some of the same shares
> mounted on other boxes and no other box other than the Myth box has issues
> with the shares (i.e. When the myth box can't access them the rest of the
> boxes can.)
> 
> All of the exports on the NAS use the same export type (pretty basic):
> 
> /mnt/video3 192.168.100.0/24(rw,async)
> 
> And are being mounted as follows:
> 
> nas:/mnt/video3         /mnt/video3             nfs
> intr,rsize=8192,wsize=8192,async,nfsvers=3,bg,actimeo=0,tcp
> 
> HELP?  Any ideas?  Would dropping a mythbuntu 9.04 DVD in the drive and
> doing an "upgrade" (is this possible without blowing away settings?) to
> replace all the system packages with what they should be help?  Can I do a
> non-destructive "something's broken, fix it" installation?  Any particular
> packages I can remove-reinstall to see about fixing this?
> 
> Is there a better way to mount these shares or is there a known bug with
> NFS?
> 
> --Doug


I had this (still do I suppose) but I just have a cronjob that does
a 'df' on each of the NFS filesystems every 12 minutes to keep the
mounts active.


"Why is it so hot inside this handbasket?"
--
Steve Heistand
steve at heistand.org