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

[Stephan Wiesand]

9747 was merged.

On Apr 8, 2013, at 22:27 , Derrick Brashear <shadow@gmail.com> wrote:

> 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.
>=20
> 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.
>>=20
>> 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."
>>=20
>> with thanks
>> dk
>>=20
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
>> Behaviour: All clients with AFS home directories see 20 minute delay =
before
>> files accessible. Then suddenly all files available and all proceeds =
normally.
>>=20
>> For reference, please find report filed July 14 2012 re 1.6.1 client =
below:
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
>> 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.
>>=20
>>=20
>> =
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>> duncan kincaid
>> cron | mit school of architecture and planning
>>=20
>>=20
>>=20
>>=20
>> _______________________________________________
>> port-darwin mailing list
>> port-darwin@openafs.org
>> https://lists.openafs.org/mailman/listinfo/port-darwin

--=20
Stephan Wiesand
DESY - DV -
Platanenallee 6
15732 Zeuthen, Germany