[LU-2901] Duplicate filename on the same ldiskfs directory on MDS

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.1.6, Lustre 2.4.1, Lustre 2.5.0
• Affects Version/s: Lustre 2.3.0, Lustre 2.1.3, Lustre 2.1.6, Lustre 2.4.1
• Severity: 3
• Assignee: Lai Siyao
• Reporter: Diego Moreno (Inactive)

Description

We meet 3 times on 3 differents lustre MDS ldiskfs filesystem
a duplicate name file on a directory, for example:

2012 Dec 4 10:59:22 bigfoot2 :

cdep4-MDT0000 Starting fsck
cdep4-MDT0000 Pass 1: Checking inodes, blocks, and sizes
cdep4-MDT0000 Pass 2: Checking directory structure
cdep4-MDT0000 Duplicate entry 'BDE_UCD.00000-00001' found.
cdep4-MDT0000 Marking /ROOT/yack/group/USER/test9 (836767265) to be rebuilt.
cdep4-MDT0000
cdep4-MDT0000 Duplicate entry 'BDE_UCD.00000-00001' found.
cdep4-MDT0000 Marking /ROOT/yack/group/USER/test9_pscc (838872002) to be rebuilt.
cdep4-MDT0000
cdep4-MDT0000 Pass 3: Checking directory connectivity
cdep4-MDT0000 Pass 3A: optimizing directories
cdep4-MDT0000 Entry 'BDE_UCD.00000-00001' in /ROOT/yack/group/USER/test9 (836767265) has a non-unique filename.
cdep4-MDT0000 Rename to BDE_UCD.00000-0000~0? yes
cdep4-MDT0000
cdep4-MDT0000 Entry 'BDE_UCD.00000-00001' in /ROOT/yack/group/USER/test9_pscc (838872002) has a non-unique filename.
cdep4-MDT0000 Rename to BDE_UCD.00000-0000~0? yes
cdep4-MDT0000
cdep4-MDT0000 Pass 4: Checking reference counts
cdep4-MDT0000 Pass 5: Checking group summary information
cdep4-MDT0000
cdep4-MDT0000: ***** FILE SYSTEM WAS MODIFIED *****
cdep4-MDT0000: 2872950/878051328 files (0.8% non-contiguous), 111956436/878047232 blocks

In this case, running the ls command we can see the issue:

total 0
Fri Nov 30 16:20:22 + 0.00 ###############################################################################
Fri Nov 30 16:20:22 + 0.00 ## Contenu du repertoire cache_dep /cea/cache_dep/yack/group/USER/test9_ ##
Fri Nov 30 16:20:22 + 0.00 ## pscc ##
Fri Nov 30 16:20:22 + 0.00 ###############################################################################
total 331844
rw-rr- 1 USER f7 10240 Nov 30 16:19 BDE_DIVERS
rw-r---- 1 USER f7 140615680 Nov 30 16:09 BDE_MAILLAGE
rw-rr- 1 USER f7 10240 Nov 30 16:20 BDE_POST1D
rw-rr- 1 USER f7 99563008 Nov 30 16:16 BDE_UCD.00000-00001
rw-rr- 1 USER f7 99563008 Nov 30 16:16 BDE_UCD.00000-00001

Then running debugfs after the fsck we can see that both 2 files
exist on 2 different inodes:

[root@bigfoot2 ~]# /usr/lib/lustre/debugfs /dev/mapper/da1vg0_mdt
debugfs 1.42.3.wc3 (15-Aug-2012)
debugfs: ls
2 (12) . 2 (12) .. 11 (20) lost+found 589299713 (16) CONFIGS
637534209 (16) OBJECTS 12 (20) lov_objid 13 (16) oi.16
14 (12) fld 15 (16) seq_srv 16 (16) seq_ctl 17 (20) capa_keys
627048449 (16) PENDING 643825665 (12) ROOT 18 (20) last_rcvd
700448769 (20) REM_OBJ_DIR 19 (3852) CATALOGS
debugfs: cd ROOT/yack/group/USER
debugfs: cd test9_pscc
debugfs: ls
838872002 (28) . 643826507 (28) ..
838873362 (28) BDE_UCD.00000-0000~0 838875198 (48) BDE_UCD.00000-00001
838875615 (36) BDE_POST1D 838877439 (40) BDE_MAILLAGE
838877482 (36) BDE_DIVERS 838877492 (3852) BDE_PROT_LAG.00001-00001
debugfs:
debugfs: stat BDE_UCD.00000-0000~0
Inode: 838873362 Type: regular Mode: 0644 Flags: 0x0
Generation: 2475899703 Version: 0x0000002b:1ecd9699
User: 3083 Group: 5214 Size: 0
File ACL: 0 Directory ACL: 0
Links: 1 Blockcount: 0
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x50b8cde4:00000000 – Fri Nov 30 16:16:52 2012
atime: 0x50bf189a:00000000 – Wed Dec 5 10:49:14 2012
mtime: 0x50b8cde4:00000000 – Fri Nov 30 16:16:52 2012
crtime: 0x50b8cc66:aa4a5734 – Fri Nov 30 16:10:30 2012
Size of extra inode fields: 28
Extended attributes stored in inode body:
lma = "00 00 00 00 00 00 00 00 71 be 71 17 02 00 00 00 4b 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0
0 00 00 00 00 " (64)
lma: fid=[0x21771be71:0x4b:0x0]
lov = "d0 0b d1 0b 01 00 00 00 4b 00 00 00 00 00 00 00 71 be 71 17 02 00 00 00 00 00 40 00 03 00 00 00 99 9f
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 13 00 00 00 18 ad 00 0
0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0d 02 00 00 c9 af 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 53 02 00 00 " (104)
link = "df f1 ea 11 01 00 00 00 3d 00 00 00 00 00 00 00 39 41 6c 65 70 68 6f 4d 00 25 00 00 00 02 17 59 a0 d1
00 00 34 fb 00 00 00 00 42 44 45 5f 55 43 44 2e 30 30 30 30 30 2d 30 30 30
30 31 " (61)
BLOCKS:

debugfs: stat BDE_UCD.00000-00001
Inode: 838875198 Type: regular Mode: 0644 Flags: 0x0
Generation: 2475897856 Version: 0x0000002b:1ec71356
User: 3083 Group: 5214 Size: 0
File ACL: 0 Directory ACL: 0
Links: 1 Blockcount: 0
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x50b8c8fd:00000000 – Fri Nov 30 15:55:57 2012
atime: 0x50bf18a0:00000000 – Wed Dec 5 10:49:20 2012
mtime: 0x50b8c8fd:00000000 – Fri Nov 30 15:55:57 2012
crtime: 0x50b8c6c2:977f5a84 – Fri Nov 30 15:46:26 2012
Size of extra inode fields: 28
Extended attributes stored in inode body:
lma = "00 00 00 00 00 00 00 00 ef 0a 4f 17 02 00 00 00 52 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0
0 00 00 00 00 " (64)
lma: fid=[0x2174f0aef:0x52:0x0]
lov = "d0 0b d1 0b 01 00 00 00 52 00 00 00 00 00 00 00 ef 0a 4f 17 02 00 00 00 00 00 40 00 03 00 00 00 59 27
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 c2 00 00 00 9b a6 00 0
0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 b9 01 00 00 08 ac 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 db 02 00 00 " (104)
link = "df f1 ea 11 01 00 00 00 3d 00 00 00 00 00 00 00 39 41 6c 65 70 68 6f 4d 00 25 00 00 00 02 17 59 a0 d1
00 00 34 fb 00 00 00 00 42 44 45 5f 55 43 44 2e 30 30 30 30 30 2d 30 30 30
30 31 " (61)
BLOCKS:

Another trace can be found attached to this ticket.

Is this a known issue?

Issue Links

• is related to: LU-3439 User code creating multiple lockfiles with same name