Re: [Xen-API] Snapshot causes disk errors and VM crashes

[Mark Benson <md.benson@xxxxxxxxx>]

(Sorry, I will try not to. I always set mailing lists up to reply-to the list, not the poster, perhaps someone can suggest this to the admins!)

Where should I look now? I am relatively new to Xen but am going to be admin for this system eventually so needo t know these things :)

--Â

Mark Benson

On Fri, Nov 21, 2014 at 12:47 PM, Thanos Makatos <thanos.makatos@xxxxxxxxxx> wrote:

(Please don't drop xen-api from the CC)

> I dropped them all here, the large ones are trimmed to the relevant day only:
>
> https://www.dropbox.com/sh/4v1l141dw7fao3c/AAC8YrMONznv6Wdl0Y0Yy
> ueCa?dl=0
>
> I think the relevant time frame is about 20-11-2014 at 09:20-10:30 - I think the
> snapshot was around 09:35
>
> That's a bit non-standard but I don't see anything wrong with it.

I see lots of errors like the following:

Nov 20 09:39:21 kalimantan tapdisk[1899]: ERROR: errno -14 at vhd_complete: /var/run/sr-mount/34ff5733-1e1d-dc84-137e-95c849222ca4/2f6a71be-c1e7-4463-a77c-0d0e627745a3.vhd: op: 5, lsec: 33456128, secs: 8, nbytes: 4096, blk: 8168, blk_offset: 4294967295

Which most certainly lead to the VM experiencing I/O errors. errno -14 is EFAULT (bad address) which is returned to tapdisk by some fairly low level function, possible some system call, unfortunately there isn't more information related to that.

Can you check your logs for anything of interest around that time?

_______________________________________________
Xen-api mailing list
Xen-api@xxxxxxxxxxxxx
http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api