[stgt] what do these abort_cmd(1324) and abort_task_set(1348) messages in the logs mean?

[FUJITA Tomonori]

On Wed, 09 Jul 2014 16:33:18 +0200
Jelle de Jong <jelledejong at powercraft.nl> wrote:

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> Dear FUJITA,
> 
> On 09/07/14 16:16, FUJITA Tomonori wrote:
>> On Wed, 09 Jul 2014 16:15:42 +0200 Jelle de Jong
>> <jelledejong at powercraft.nl> wrote:
>> 
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>>> Dear FUJITA,
>>> 
>>> On 27/06/14 13:57, FUJITA Tomonori wrote:
>>>> On Tue, 17 Jun 2014 12:24:07 +0200 Jelle de Jong 
>>>> <jelledejong at powercraft.nl> wrote:
>>>> 
>>>>> What do these tgtd messages mean? Is something wrong? Why
>>>>> are they there?
>>>>> 
>>>>> http://paste.debian.net/105427/
>>>> 
>>>> A SCSI command was aborted for some reason (e.g. the time-out
>>>> of a SCSI command due to the overloaded iscsi target).
>>>> 
>>>> The cricial bug about this was fixed in 1.0.48. I would
>>>> recommend you to update tgt if you use the older version.
>>> 
>>> I upgraded to version 1.0.48 about a week ago for further
>>> testing, I also added a complete new network path, with new
>>> network cards and direct connections, but I keep getting these
>>> same errors:
>>> 
>>> http://paste.debian.net/108884/
>>> 
>>> Is this a bug in tgtd? Is there some tgtd option or environment 
>>> variable that I can set to get more information.
>> 
>> It's not a bug. It's just a message tells that SCSI command
>> time-out happens for some reasons.
> 
> Can you help me with some more information to solve the problems?
> 
> Is this SCSI command time-out something that happened on the target
> server with the storage, my storage is having a hard time with high
> latencies, but I am not having any hardware warnings/errors. Or is
> this related to the iSCSI client servers as well?

Without any hardware errors, a target could takes long time to execute
SCSI commands (e.g., simply overloaded). It depends on your
environment.

You could set a longer value for SCSI command time-out on the client
side.
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