Discussion:
Problem: xend.log says "VM restarting too fast. Refusing to restart to avoid loops"
Andrea Monti
2013-06-19 16:37:30 UTC
Permalink
Hi all,
one of my servers crashed last sunday just right after a startup and I need
to understand what was going on.
I am running Windows 2008 R2 Standard Edition on Oracle VM 3.1 - Xen
4.1.2-OVM

On sunday a scheduled task shutted down cleanly the vm.
the shutdown started at Sun Jun 16 10:00:33 and it ended at 2013-06-16
10:00:46.938.
xend.log says:

[2013-06-16 10:00:45 7228] INFO (XendDomainInfo:2148) Domain has shutdown:
name=0004fb00000600008f562ccf5ed488f8 id=6 reason=poweroff.

So far, so good

The same virtual machine has been started on Sun Jun 16 10:01:55 .
xend.logs says
[2013-06-16 10:01:56 7228] DEBUG (XendDomainInfo:106)
XendDomainInfo.create(['vm', ['name', '0004fb00000600008f562ccf5ed488f8'],
['memory', 1536], ['maxmem', 1536], ...
...
[2013-06-16 10:01:57 7228] INFO (XendDomain:1225) Domain
0004fb00000600008f562ccf5ed488f8 (7) unpaused.

once again so far so good

After less than one minute xend.log says

[2013-06-16 10:02:54 7228] WARNING (XendDomainInfo:2131) Domain has
crashed: name=0004fb00000600008f562ccf5ed488f8 id=7.
[2013-06-16 10:02:54 7228] ERROR (XendDomainInfo:2265) VM
0004fb00000600008f562ccf5ed488f8 restarting too fast (Elapsed time:
57.838376 seconds). Refusing to restart to
avoid loops.
[2013-06-16 10:02:54 7228] DEBUG (XendDomainInfo:3145)
XendDomainInfo.destroy: domid=7
[2013-06-16 10:02:55 7228] DEBUG (XendDomainInfo:2473) Destroying device
model
[2013-06-16 10:02:55 7228] INFO (image:612)
0004fb00000600008f562ccf5ed488f8 device model terminated
[2013-06-16 10:02:55 7228] DEBUG (XendDomainInfo:2480) Releasing devices

WHAT !?!?!
What does "VM restarting too fast" mean?

Thanks for every answer
Regards
Andrea
Ian Campbell
2013-06-25 09:03:38 UTC
Permalink
Post by Andrea Monti
I am running Windows 2008 R2 Standard Edition on Oracle VM 3.1 - Xen
4.1.2-OVM
You should probably contact OVM support.
Post by Andrea Monti
After less than one minute xend.log says
[2013-06-16 10:02:54 7228] WARNING (XendDomainInfo:2131) Domain has crashed: name=0004fb00000600008f562ccf5ed488f8 id=7.
[2013-06-16 10:02:54 7228] ERROR (XendDomainInfo:2265) VM 0004fb00000600008f562ccf5ed488f8 restarting too fast (Elapsed time: 57.838376 seconds). Refusing to restart to
avoid loops.
[2013-06-16 10:02:54 7228] DEBUG (XendDomainInfo:3145) XendDomainInfo.destroy: domid=7
[2013-06-16 10:02:55 7228] DEBUG (XendDomainInfo:2473) Destroying device model
[2013-06-16 10:02:55 7228] INFO (image:612) 0004fb00000600008f562ccf5ed488f8 device model terminated
[2013-06-16 10:02:55 7228] DEBUG (XendDomainInfo:2480) Releasing devices
WHAT !?!?!
What does "VM restarting too fast" mean?
The domain keeps crashing. Xend will retry it a few times but will
eventually give up rather than just keep banging its head against the
wall.

Unfortunately there is no clue as to the reason for the crash in the
logs etc which you have shown here. Perhaps there was something a bit
earlier in the log?

Otherwise you could try adding 'on_crash = "preserve"' to your domain
configuration and see if that lets you see anything e.g. on the VNC etc.
You should also check all the files under /var/log/xen and the xen dmesg
("xm dmesg") for clues. The OVM support guys can likely also direct you
on OVM specific places to look etc.

Ian.
Konrad Rzeszutek Wilk
2013-06-25 14:13:58 UTC
Permalink
Post by Ian Campbell
Post by Andrea Monti
I am running Windows 2008 R2 Standard Edition on Oracle VM 3.1 - Xen
4.1.2-OVM
You should probably contact OVM support.
Yes please.
Post by Ian Campbell
Post by Andrea Monti
After less than one minute xend.log says
[2013-06-16 10:02:54 7228] WARNING (XendDomainInfo:2131) Domain has crashed: name=0004fb00000600008f562ccf5ed488f8 id=7.
[2013-06-16 10:02:54 7228] ERROR (XendDomainInfo:2265) VM 0004fb00000600008f562ccf5ed488f8 restarting too fast (Elapsed time: 57.838376 seconds). Refusing to restart to
avoid loops.
[2013-06-16 10:02:54 7228] DEBUG (XendDomainInfo:3145) XendDomainInfo.destroy: domid=7
[2013-06-16 10:02:55 7228] DEBUG (XendDomainInfo:2473) Destroying device model
[2013-06-16 10:02:55 7228] INFO (image:612) 0004fb00000600008f562ccf5ed488f8 device model terminated
[2013-06-16 10:02:55 7228] DEBUG (XendDomainInfo:2480) Releasing devices
WHAT !?!?!
What does "VM restarting too fast" mean?
The domain keeps crashing. Xend will retry it a few times but will
eventually give up rather than just keep banging its head against the
wall.
Unfortunately there is no clue as to the reason for the crash in the
logs etc which you have shown here. Perhaps there was something a bit
earlier in the log?
Otherwise you could try adding 'on_crash = "preserve"' to your domain
configuration and see if that lets you see anything e.g. on the VNC etc.
You should also check all the files under /var/log/xen and the xen dmesg
("xm dmesg") for clues. The OVM support guys can likely also direct you
on OVM specific places to look etc.
Correct. Please do open a ticket with them.
Post by Ian Campbell
Ian.
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