[OpenAFS-port-darwin] OpenAFS 1.6.2 on OS X 10.8: suspected deadlock

[Derrick Brashear]

Indeed. Sorry. 1.6 version is 9747. Stephan, this is a 1.6.2
regression and only applies
to MacOS, so it should be noncontroversial.

On Mon, Apr 8, 2013 at 4:21 PM, Duncan S Kincaid <dsk@mit.edu> wrote:
> this problem was evident in OpenAFS Client 1.6.1 but resolved in OpenAFS Client 1.6.1a.
> It seems to have resurfaced under 1.6.2.
>
> Issue with 1.6.1 was identified by Derrick and fixed:
> "the good: you're out of Rx packets.
> the bad: not sure where they all are yet!"
> and
> "never mind. found it. gerrit 7788."
>
> with thanks
> dk
>
> ==========================
> Behaviour: All clients with AFS home directories see 20 minute delay before
> files accessible. Then suddenly all files available and all proceeds normally.
>
> For reference, please find report filed July 14 2012 re 1.6.1 client below:
> ==========================
> 1. spinning beach ball for *exactly* 20 minutes, then session returns to normal
> 2. can confirm user gets tokens and TGT at login (using LoginHook and LaunchAgent scripts)
> 3. ssh connections as root into the beach balling mac reveal following:
>         a. no CPU load. All processes 'stuck' or 'sleeping' (apart from 'top', of course)
>         b. virtually no system.log file entires from time of beach balling. at 20 minute mark lots of 'time out' errors logged.
>         c. attempts to traverse afs directory tree results in shell locking up completely
> 4. tcpdumps show very little afs traffic**. mostly pings (rx ack) to servers/databases at rate of 2-5/sec. at the 20 minute mark, a barrage of traffic (rx data). (500-4000/sec)****.
> 5. local users (those whose home directories reside on computer hard drive) have never seen this problem
> 6. this problem occurs irrespective of particular user with home directory in AFS, AFS server storing his home directory, AFS cell,  and client computer OS.
> 7. 'Action At A Distance': when the beach ball spins on Macintosh, mounting the same user's AFS home from another computer (Linux box) takes 2 minutes as opposed to customary 1-2 seconds. subsequent Linux logins are normal.
>
>
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> duncan kincaid
> cron | mit school of architecture and planning
>
>
>
>
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-- 
Derrick