[lustre-discuss] unable to precreate -52/-116

[Marco Grossi]

Hi Amit,

We had a similar issue after a set_param of "max_create_count=0"

In our case re-mounting the MDT (not the OST) fixed the issue.

Hope it helps.

Regards,
Marco


On 3/3/20 8:25 PM, Kumar, Amit wrote:
> Dear Lustre,
> 
>  
> 
> Recently we had a degraded(Not failed) RAID and had to wait longer to
> get compatible disk, as we had received incompatible one and it took
> over a week to get the correct one back in place.
> 
>  
> 
> During this wait I ended up disabling the OST first and then noticed
> continuous IO to the OST and thought of disabling object creation on it
> as well. Everything looked normal after that and once the disk was
> replaced I reenabled object creation and enabled OST. Since then I
> started seeing these messages on OST
> 
> …(ofd_dev.c:1784:ofd_create_hdl()) scratch0-OST0029: unable to
> precreate: rc = -52
> 
> And following messages on MDS
> 
> …(osp_precreate.c:1282:osp_precreate_thread())
> scratch0-OST0029-osc-MDT0000: cannot precreate objects: rc = -116
> 
> …(osp_precreate.c:657:osp_precreate_send())
> scratch0-OST0029-osc-MDT0000: precreate fid [0x100290000:0x101b39a:0x0]
> < local used fid [0x100290000:0x101b39a:0x0]: rc = -116
> 
>  
> 
> These messages don’t seem to stop. I am wondering what impact could
> these errors have in long run? I have noticed I am not able to create
> files on this particular OST using lfs setstripe, when I do so it gets
> me an object on another OST by default. Just want to make sure this is
> not causing any data loss for files the currently on them and new requests?
> 
> We plan to upgrade to 2.12 in the summer downtime and assuming that has
> a fix based on LU-9442 & LU-11186.  Currently running servers on lustre
> 10.4.1 over ZFS-0.7.9-1
> 
>  
> 
> Any help is greatly appreciated.
> 
>  
> 
> Thank you,
> Amit
> 
> 
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> 

-- 
Marco Grossi
ICHEC Systems Team