[Lustre-discuss] LustreError: acquire timeout exceeded

[Andreas Dilger]

On Jul 29, 2008  18:51 +0200, Thomas Roth wrote:
> kern.log.1:Jul 20 06:47:19 kernel: LustreError: 
> 27696:0:(upcall_cache.c:326:upcall_cache_get_entry()) acquire timeout 
> exceeded for key 0
> kern.log.1:Jul 20 06:47:41 kernel: LustreError: 
> 27713:0:(upcall_cache.c:326:upcall_cache_get_entry()) acquire timeout 
> exceeded for key 0

This means the MDS was unable to find supplementary group information
for the root user.

> Of course these temporal coincidences look verrrrry suspicious. So far, 
> I have no idea what kind of weird script might be running at these times 
> causing all the trouble, still I'm already looking forward to next 
> Sunday ;-)

It isn't clear whether this is cause or effect though.  If you use any
kind of network user/group database (LDAP, NIS, etc) then the timeout
likely means that the network had already failed at this time.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.