[DRBD-user] magic failure

Ben Clewett Ben.Clewett at roadtech.co.uk
Mon Jan 28 12:36:14 CET 2013

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Hi Lars

As ever, the perfect answer.  Thanks for your help.  We will see how we 
get on.

Regards,

Ben


On 2013-01-28 10:41, Lars Ellenberg wrote:
> On Mon, Jan 28, 2013 at 09:31:31AM +0000, Ben Clewett wrote:
>> Hi guys,
>>
>> We have a failure which hits us every few weeks on just one server.
>> We suspect hardware issue on the network card.  But it's proving
>> hard to tie down.   This is the failure and I would be interested in
>> the opinion of this group.
>>
>> Error:
>>
>> [1580483.649257] block drbd0: magic?? on data m: 0x0 c: 0 l: 0
>
>
> Each DRBD network packet starts with a DRBD specific header.
> That header contains a "magic" number, a "command" id,
> and a payload "length".
>
> All three of them are apparently zeroed out.
> So yes, that pretty much looks like your network path
> somehow managed to zero out at least the start of a packet.
>
>
> The asserts below are "boring", and the code has since been fixed to no
> longer trigger those.
>
>> [1580483.649269] block drbd0: ASSERT FAILED cstate = Connected,
>> expected < WFConnection
>> [1580483.649286] block drbd0: ASSERT( mdev->state.conn < C_CONNECTED
>> ) in
>> /usr/src/packages/BUILD/drbd-8.3.4/obj/default/drbd_receiver.c:4500
>> [1580483.649295] block drbd0: asender terminated
>> [1580483.649301] block drbd0: Terminating asender thread
>> [1580483.649384] block drbd0: Connection closed
>> [1580483.649390] block drbd0: peer( Primary -> Unknown ) conn(
>> Connected -> Unconnected ) pdsk( UpToDate -> DUnknown )
>> [1580483.649396] block drbd0: receiver terminated
>> [1580483.649399] block drbd0: Terminating receiver thread
>>
>> /proc/drbd
>> version: 8.3.4 (api:88/proto:86-91)
>
> I recommend to upgrade to 8.3.15,
> enable "data integrity checksumming",
> run an online-verify,
> and see where that gets you.
>



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