[OpenAFS] many packet are as rx_ignoreAckedPacket and meltdown

[Lubos Kejzlar]

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Hi Robert,
	and many thanks for your reply!

Let me answer on behalf on Michal - we are co-workes and Michal has left to 
vacations for couple of days ;-)

Robert Banz wrote:

> First, upgrade your fileserver an actual "production" release, such as 
> 1.4.1.  1.3.81 was pretty good, but, not without problems.  (1.4.1 is 
> not without problems, but with less.)

We are thinking of that as a one (last) of possibility, but we are running tens 
of linux (Debian/stable) servers (not only AFS) as a part of our distributed 
computing environment and we are trying to keep our server configuration as 
close as possible to stable dist. And short summary: we don't have any 
significant AFS problems with same configuration for 1+years...

> Second, when your server goes into a this state, does it come out of it 
> naturally or do you have to restart it?

Actually, this state can "freeze" many of our users and services (even if 
affected server servers RO replicas only... and yes, I really don't understand 
this behavior...) and FS is unable to return to "normal" state at reasonable 
time (actually / reasonable time is pretty small for us/our users...). So, we 
are trying to "solve" our current problems with fs restart. :-(

(
As you can see from original post, FS is still alive, but has no idle threads. 
Waiting connections (clients) oscillate around 200 and "probably" could be serve 
in tens of minutes...
)

Thanks again for your reply and suggestions!!


-- 
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Lubos Kejzlar
Head of Laboratory for Computer Science

Center for Information Technology              Tel.:      +420-377 632 710
University of West Bohemia                                +420-724 094 277
Univerzitni 8, 306 14 Pilsen                   Fax:       +420-377 632 702
Czech Republic                                 E-mail:  kejzlar@civ.zcu.cz
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