[Pkg-iscsi-maintainers] Bug#629442: Bug#629442: iscsitarget: ietd gives "iscsi_trgt: Abort Task" errors on high disk load and iscsi connections are dropped

[Ritesh Raj Sarraf]

On 06/11/2011 05:45 PM, Massimiliano Ferrero wrote:
>>
> No, it happens only on heavy load, the storage server performs also
> several other functions other than iscsi target, one of these is
> monitoring all the virtual machines with nagios and munin: munin updates
> run every 5 minutes with a lot of data written to disk, this has never
> been a problem.
> The only situation that triggers the problem is while performing an
> operation like dd or a file system check that is really i/o intensive on
> the storage server.
> The second time I experienced the problem I was connected with ssh to
> the system during the dd watching the log files: i saw real time the
> abort messages and I was able to stop the dd and react to the failure
> (restart cluster nodes, check virtual machines, etc.), this just to say
> that it was not necessary to restart the iscsi target and that the
> system was not unresponsive.
> 
> I will update the bug as soon as I can test it on another machine.

I'm afraid this won't be an easy bug to root cause. But let's give it a
shot.

Next time, when you try to test/re-create the bug, capture dstat output.
The default dstat output is good enough to report us on the system state
was during starvation.


-- 
Ritesh Raj Sarraf | http://people.debian.org/~rrs
Debian - The Universal Operating System

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 900 bytes
Desc: OpenPGP digital signature
URL: <http://lists.alioth.debian.org/pipermail/pkg-iscsi-maintainers/attachments/20110611/0cd25640/attachment-0001.pgp>