[OpenAFS] find /afs/ breaking the client?

[Derrick J Brashear]

On Wed, 7 Feb 2007, Jakub Witkowski wrote:

>>> No, no oops. The system just... blocks. You can interact with programs
>>> already in memory, access open files, but not open new.
>>>
>>> I chose .14 mostly because I was having problems building the module for
>>> Xen kernel and this version simply was first that I got compiled. I may
>>> fall back to something more stable now, as I know how to get things
>>> running.
>>>
>>> Which OpenAFS version you recommend for installation on a client? On a
>>> server?
>>
>> For Linux, we haven't recommended any 1.5.x client. 1.4.2, generally,
>> though 1.4.3rc2 should be out in a day or so.
>>
>> If you can get cmdebug information when it's hung, that's be useful to
>> see.
>
> I have done some experiments and my findings are not exactly optimistic.
> First of all, I found out that the hang was actually caused by some
> weird interaction between OpenAFS client and libnss-ldap library; in
> test enviroinment I can reproduce the systemwide hang described above
> when I set up nsswitch library to look uids up in ldap, but if it is not
> configured to do so, only the find process hangs - and then, only for a
> few minutes. Adding -fakestat-all switch makes the problem less
> pronounced (i.e. find lists more files) but not go away.

Actually, when it's hung in 1.5.x getting a task list (alt-sysrq-t) would 
be useful, if you can do it.