Lustre discuss - Sep 2010 - ll_glimpse_size() causing intermittent EIO

We''re seeing a problem recently with a 1.8.4 server and both 1.8.2 and 
1.8.4 clients. We get intermittent log entries on the client like this:

LustreError: 32493:0:(file.c:995:ll_glimpse_size()) obd_enqueue returned 
rc -5, returning -EIO

Occasionally we get "rc -4" instead of -5. The client code fails with
an
I/O error, as you''d expect. We can''t find matching log entries
on the
server.

Trying the same file on the same or different clients again a few 
minutes later works fine. We''re seeing this on lots of different
clients
but intermittently and fairly rarely, but it obviously it tends to crash 
user jobs. Any ideas what could be causing it?

-- 
Fraser McCrossan              | mail  fm at sharcnet.ca
Systems Administrator         | phone (519)661-2111 x80360
SHARCNET                      | MSN   fm at sharcnet.ca
University of Western Ontario |

On 9/17/10 2:43 AM, Fraser McCrossan wrote:
>    We''re seeing a problem recently with a 1.8.4 server and both
1.8.2 and
> 1.8.4 clients. We get intermittent log entries on the client like this:
>
> LustreError: 32493:0:(file.c:995:ll_glimpse_size()) obd_enqueue returned
> rc -5, returning -EIO
>
> Occasionally we get "rc -4" instead of -5. The client code fails
with an
> I/O error, as you''d expect. We can''t find matching log
entries on the
> server.
>
> Trying the same file on the same or different clients again a few
> minutes later works fine. We''re seeing this on lots of different
clients
> but intermittently and fairly rarely, but it obviously it tends to crash
> user jobs. Any ideas what could be causing it?
>
Have you compared your issues with Lustre bug 22622?
https://bugzilla.lustre.org/show_bug.cgi?id=22622
Some similar, but not sure. Good Luck.

Cheers,
Nasf