[Pkg-iscsi-maintainers] Bug#687619: Bug#687619: iscsitarget restart fail if more than 32 session try reconnect

[Ritesh Raj Sarraf]

On Friday 14 September 2012 07:01 PM, Laszlo Fekete wrote:
> In the logs reports iscsi connection error detected and try to recover.
> 
Is there an error message/code ?

>> If the iscsi target restart fail it random which initiator stuck, I think it 
> only depend on who is the faster to be in the first 32 session. 
>> I am not sure here. The open-iscsi default replacement timeout is 120 secs. 
> Even then, when the target is back, it will poll it.
>>
> You're right, I meant for 5sec default settings this:
> node.conn[0].timeo.noop_out_interval = 5
> node.conn[0].timeo.noop_out_timeout = 5
> and with 1 sec also this settings on those connections where using multipath.
>

Why do you change it to 1 ? That's a very low value and will just flood
the target.

>>
>> Tried to check, maybe this is a network connection, but if the restart fail 
> and try to telnet to them sometimes it also don't answer (tcpdump show, that 
> the target server got the request, but don't send any answer). 
>>
>> Checked that maybe on the iscsi target stop stucked, but it seems to be 
> okay, the session closed, the modules unloaded, there isn't any error, tried 
> to raise the sleep time before start to 10 sec from 1, but got the same error. 
>> What 1 sec setting are you referring here?
>>
> Sleep time in init script which is in restart after the stop and before the 
> start.
> 

That sleep won't help.


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

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