[DRBD-user] restart of both servers after network failure ??? (large)

Lars Ellenberg lars.ellenberg at linbit.com
Sat May 9 12:20:34 CEST 2009

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


On Fri, May 08, 2009 at 05:38:06PM -0400, Victor Hugo dos Santos wrote:
> On Fri, Feb 20, 2009 at 2:37 PM, Victor Hugo dos Santos
> <listas.vhs at gmail.com> wrote:
> > Hello,
> >
> > I have a problem with drbd-0.7.25 and drbd-0.8.2.6... my situation is:
> >
> > two servers Supermicro in company A connected with crossover cable and
> > CentOS 5.2 (all updates installed)
> > two servers Poweredge in company B connected with network fiber in
> > separate sites and Citrix XenServer 4 installed.
> >
> > the problem is that time in time, both servers restart without
> > apparent reason.. in logs, only show messages about network failure
> > and after this, server restart.
> > in company A... this problem occurred 2 o 3 times and the last
> > incident is on 4 months ago..
> > and I had forget this problem.. because, I think that could be for
> > electrical energy line in this company.
> > but now, in company B.. I have the same problem for first time (after
> > various months work fine) and this servers is connected in UPS line.
> >
> > two servers groups are running a Virtualization Server.. but from
> > different vendors and configurations..
> > Memory, disks and network work fine in four servers and, DRBD resource
> > contain only data from VMs, none files/data from owner server.
> >
> > and I don't understand why servers restart when recive a error from
> > network !!???
> > and in case of problem..I think that restart of VMs is probably but
> > not of complete Server.
> >
> > Above, logs and config file of two servers in company B...
> 
> hello,
> 
> one time more, I have the same problem, but in other company and other
> hardwares and others configurations !! :D
> 
> My problem: one node restart (not exists errors in logs files) and
> after a couple seconds, the other node restart too. In the second node
> I have this lines:
> 
> ================
> May  8 16:31:46 blueback kernel: drbd1: PingAck did not arrive in time.
> May  8 16:31:46 blueback kernel: drbd1: peer( Secondary -> Unknown )
> conn( Connected -> NetworkFailure ) pdsk( UpToDate -> DUnknown )
> May  8 16:31:46 blueback kernel: drbd1: asender terminated
> May  8 16:31:46 blueback kernel: drbd1: Terminating asender thread
> May  8 16:31:46 blueback kernel: drbd1: short read expecting header on
> sock: r=-512
> May  8 16:31:46 blueback kernel: drbd1: Creating new current UUID
> May  8 16:31:46 blueback kernel: drbd0: PingAck did not arrive in time.
> May  8 16:31:46 blueback kernel: drbd0: peer( Primary -> Unknown )
> conn( Connected -> NetworkFailure ) pdsk( UpToDate -> DUnknown )
> May  8 16:31:46 blueback kernel: drbd0: asender terminated
> May  8 16:31:46 blueback kernel: drbd0: Terminating asender thread
> May  8 16:31:46 blueback kernel: drbd0: short read expecting header on
> sock: r=-512
> May  8 16:38:19 blueback kernel: drbd: initialised. Version: 8.2.7
> (api:88/proto:86-88)
> May  8 16:38:19 blueback kernel: drbd: GIT-hash:
> 61b7f4c2fc34fe3d2acf7be6bcc1fc2684708a7d build by
> root at localhost.localdomain, 2009-02-19 13:47:49
> ================
> 
> and I don't understand the origin of problem:
> this is my actual configuration:
> 
> - two server poweredge R900, with 64G ram and 8 CPUs
> - two resources drbd (drbd0 and drbd1)
> - one gigabit nic exclusive for drbd
> 
> This is version of softwares:
> 
> XenServer 5.0 (update 2) with kernel 2.6.18-92.1.10.el5.xs5.0.0.404.646xen
> DRBD Version: 8.2.7 (api:88)

> any, any idea ?? please !! :-)

please read all posts subject
"kernel crash when secondary disappears. centos 5.3 kernel-xen issue"
(late april this year) for possible causes and work arounds.

-- 
: Lars Ellenberg                
: LINBIT HA-Solutions GmbH
: DRBD®/HA support and consulting    http://www.linbit.com

DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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