[Pkg-iscsi-maintainers] Bug#748940: iscsitarget: "service iscsitaget stop" fails when under load

[Ritesh Raj Sarraf]

Control: severity -1 normal
Control: tags -1 - upstream

On 05/22/2014 05:40 PM, Craig Barnes wrote:
> Under heavy load the iscsitarget services fails to stop on module removal.

Could you please explain what is "heavy load" here? Is it iSCSI traffic ?

>
> # service iscsitarget stop
> [ ok ] Removing iSCSI enterprise target devices: :.
> [ ok ] Stopping iSCSI enterprise target service: :.
> [....] Removing iSCSI enterprise target modules: :FATAL: Module iscsi_trgt is in use.
>
> Changing etc/init/init.debian to use `rmmod --wait` instead of `modprobe -r` corrects this issue.

We use 'modprobe -r' to ensure that dependencies also get unloaded. WIth
'rmmod --wait', wouldn't it hang the shutdown sequence ?

>
> This problem causes pacemaker to halt on failover to a secondary node when using the lsb resouce agent
> to control iscsitarget.

I'm not versed with pacemaker so can't comment much. But I don't see
this to be an iscsitarget problem. Perhaps you need to add intelligence
in pacemaker to detect a clean shutdown of the iscsitarget service.

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

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