[OpenAFS] Re: another MacOS cache manager wedging

[Adam Megacz]

Thanks for taking the time to check this out.  This issue with the CM
blocking unnecessarily seems to have been happening intermittently ever
since I upgraded from 1.4.6 to 1.4.11 (and continued with 1.4.12 while I
was using it).  Unfortunately I can't downgrade to see if it goes away
because I run Snow Leopard now.  I'm pretty darn sure this is an issue
with the client -- either something that changed in OpenAFS or else
something that changed in MacOS, because it was all humming quite nicely
beforehand.

Derrick Brashear <shadow@gmail.com> writes:
>> Lock afs_xserver status: (none_waiting, 1 read_locks(pid:0))
>> Lock afs_xvcb status: (writer_waiting, write_locked(pid:0 at:273), 2
>> waiters)
>> ** Cache entry @ 0x45dee6c4 for 200.536870919.44.36878 [megacz.com]
>>    locks: (none_waiting, write_locked(pid:10589 at:54))

> Which server is 536870919 on,

The "vos ex" output is below; let me know if you need additional
information.

> and why (from the client's perspective) would it not be answering?

I don't know.  There is a significant possibility of very small, steady
(like 3%) packet loss on the path between the client and the server, but
otherwise both servers (169.229.3.178 and gentzen.megacz.com) are up,
healthy, and responsive.

root.cell.readonly                536870919 RO         28 K  On-line
    169.229.3.178 /vicepa 
    RWrite  536870918 ROnly          0 Backup          0 
    MaxQuota       5000 K 
    Creation    Wed Jan 13 19:36:04 2010
    Copy        Sun May 11 11:42:30 2008
    Backup      Wed Jan 13 17:00:11 2010
    Last Update Wed Jan 13 19:34:12 2010
    89 accesses in the past day (i.e., vnode references)

root.cell.readonly                536870919 RO         28 K  On-line
    gentzen.megacz.com /vicepa 
    RWrite  536870918 ROnly  536880267 Backup  536870920 
    MaxQuota       5000 K 
    Creation    Wed Jan 13 19:36:04 2010
    Copy        Wed Jan 13 19:36:04 2010
    Backup      Wed Jan 13 17:00:11 2010
    Last Update Wed Jan 13 19:34:12 2010
    205 accesses in the past day (i.e., vnode references)

    RWrite: 536870918     ROnly: 536870919     Backup: 536870920
    RClone: 536870919 
    number of sites -> 4
       server 169.229.3.178 partition /vicepa RO Site  -- New release
       server gentzen.megacz.com partition /vicepa RO Site  -- Old release
       server gentzen.megacz.com partition /vicepa RW Site  -- New release
       server gentzen.megacz.com partition /vicepa RO Site  -- New release