[lustre-discuss] Listing some dirs returns "Value too large for defined data type"

[Hans Henrik Happe]

Hi,

Servers:
Lustre 2.15.8 + https://review.whamcloud.com/c/fs/lustre-release/+/63626
zfs 2.3.2

Single MDT and 24 OSTs.

Clients:
Lustre 2.15.8


Lately we have seen some dirs that will not list. I.e.:

[bad_dir]# ls
ls: reading directory '.': Value too large for defined data type
ls: reading directory '.': Value too large for defined data type
ls: reading directory '.': Value too large for defined data type
...

This loops forever. A 'find' just stops after the first error, while 
'lfs find' sees it as an empty dir without any error.

If we list a know file in that dir  (ls bad_dir/know_file) it works as 
expected.

MDS log spews out this, when listening the dir:

[Mon May 18 12:45:56 2026] Lustre: 
9081:0:(mdd_object.c:3687:mdd_dir_page_build()) build page failed: -75!
[Mon May 18 12:45:56 2026] Lustre: 
9081:0:(mdd_object.c:3687:mdd_dir_page_build()) Skipped 135 previous 
similar messages

Have anyone else seen this?

Cheers,
Hans Henrik
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lustre.org/pipermail/lustre-discuss_lists.lustre.org/attachments/20260518/6d04e0b9/attachment.html>