Lustre discuss - May 2013 - wrong Lustre quota reported for a user

Dear  Lustre Experts,


On our cluster, that has Lustre 1.8.7 (server, DDN build) and 1.8.9 (clients, 
WC build) we have found an issue with Lustre reporting incorrect FS usage stats
for at least one of the users. The  Lustre quota is not enforced but used to
account for the usage only.


The problem is for this user:

lfs quota -u auser /global/scratch

Disk quotas for user auser (uid AID):
     Filesystem  kbytes   quota   limit   grace   files   quota   limit
grace
/global/scratch 3970579340       0       0       -    5487       0       0
      -

But then, the user does not have any files there, he cleaned up
everything.  "lfs find -u auser /global/scratch" seems not to find
these
5487 files either.

Could you please suggest what could be the reason, how dangerous it is
(are we in for some more FS corruption?) and how do we fix it?  Thanks!

--
Grigory Shamov
HPC Analyst, 
Westgrid/University of Manitoba