[OpenAFS] Tokens discarded during large file transfer

[tcreedon@easystreet.com]

> W. Mark Smith <online+lists.afs-info@coffeefreak.net> wrote:
>> Most people who get this error have the problem immediately after
>> they log in. In my case, it consistently happens during large file
>> transfers. The problem occurs when I am copying a large (>1GB) file
>> to an AFS directory. At about the 500MB point in the transfer, I
>> get a "permission denied". I have to unlog then aklog to get my AFS
>> tokens again. Here is the error code that shows up in my message
>> log:
>
> Can you provide the exact syntax of the command you are using to do the
> copy?
>
> Can you run "id" as well and include it here?
>
> If "id" shows two high-numbered groups, the command is probably running
> inside a PAG.  Maybe try not using a PAG and run the copy?  (It might b=
e
> hard to get a session without a PAG, but an su command should work,
> provided you've disabled any AFS related PAM.)  I suspect the issue
> isn't PAG related though...
>


>> Feb 10 11:40:43 [hostname] kernel: afs: Tokens for user of AFS id
>> [id] for cell [cell] are discarded (rxkad error=3D19270410)
>>
>> And the corresponding error is:
>>
>> # translate_et 19270410
>> 19270410 (rxk).10 =3D sealed data inconsistent
>>
>> The server is compiled with large file support. When I do the same
>> thing on my (slower) home network, I do not have this problem, and
>> I can write files larger than 2GB.
>>
>> My configuration is RHEL4, kernel 2.6.9-42.0.8.ELsmp, and I have
>> tried both openafs 1.4.1 and 1.4.2.
>
> On the server?  Or client(s)?
>
> What does rxdebug <server> 7000 -version return?
>
>> Does anyone have any suggestions?
>
> Is this "home network" test using the exact same client and server?  Or
> just ones with a similar configuration?
>
> Is it possible that there is an actual error in your networking hardwar=
e
> that is breaking some of the packets under higher loads?
>
> Can you try forcing the link speed on your client's ethernet adapter to
> 10BASE, 100BASE, 1000BASE (if applicable) and see if the commands
> complete at the slower speed?  Or otherwise verify your duplex speed
> between server and switch and client and switch and any other network
> links in between.  (I'd say to plug your client into the server directl=
y
> using a cross-over, or at least into the same physical switch, just to
> test, if possible.)
>
> Do you happen to have another OS version that you can test with?
> Windows, Solaris, or even another Linux kernel version?  Have you tried
> not using an SMP kernel (just to test)?
>
> <<CDC
>
>
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>
Is the data going thru any firewalls?