[LU-5897] Clean downgrade from master to 2.6.0 failed: fail to init namespace LFSCK component: rc = -34

• Type: Bug
• Resolution: Duplicate
• Priority: Blocker
• Affects Version/s: Lustre 2.7.0
• Environment: before upgrade: 2.6.0; after upgrade: lustre-master tag-2.6.90 build #2733
• Severity: 3
• Assignee: WC Triage
• Reporter: Sarah Liu

Description

clean upgrade from 2.6.0 to master succeeded, after downgrade the system from 2.7 to 2.6.0, MDS failed mount as following error

Lustre: DEBUG MARKER: == upgrade-downgrade End == 14:27:31 (1415658451)
LDISKFS-fs (sdb1): mounted filesystem with ordered data mode. quota=on. Opts: 
LustreError: 11-0: lustre-MDT0000-lwp-MDT0000: Communicating with 0@lo, operation mds_connect failed with -11.
LustreError: 33587:0:(lfsck_namespace.c:1786:lfsck_namespace_setup()) lustre-MDT0000-osd: fail to init namespace LFSCK component: rc = -34
LustreError: 33587:0:(mdd_device.c:1051:mdd_prepare()) lustre-MDD0000: failed to initialize lfsck: rc = -34
LustreError: 33587:0:(obd_mount_server.c:1769:server_fill_super()) Unable to start targets: -34
LustreError: 33696:0:(qsd_reint.c:54:qsd_reint_completion()) lustre-MDT0000: failed to enqueue global quota lock, glb fid:[0x200000006:0x1010000:0x0], rc:-5
Lustre: Failing over lustre-MDT0000
LustreError: 33696:0:(qsd_reint.c:54:qsd_reint_completion()) Skipped 1 previous similar message
Lustre: 33587:0:(client.c:1926:ptlrpc_expire_one_request()) @@@ Request sent has timed out for slow reply: [sent 1415658454/real 1415658454]  req@ffff880825097800 x1484425473818752/t0(0) o251->MGC10.2.4.47@tcp@0@lo:26/25 lens 224/224 e 0 to 1 dl 1415658460 ref 2 fl Rpc:XN/0/ffffffff rc 0/-1
Lustre: server umount lustre-MDT0000 complete
LustreError: 33587:0:(obd_mount.c:1342:lustre_fill_super()) Unable to mount  (-34)
Lustre: DEBUG MARKER: Using TIMEOUT=20
Lustre: DEBUG MARKER: upgrade-downgrade : @@@@@@ FAIL: NAME=ncli not mounted
[root@onyx-25 ~]# Lustre: 34120:0:(client.c:1926:ptlrpc_expire_one_request()) @@@ Request sent has timed out for slow reply: [sent 1415658612/real 1415658612]  req@ffff880417c12c00 x1484425473818888/t0(0) o251->MGC10.2.4.47@tcp@0@lo:26/25 lens 224/224 e 0 to 1 dl 1415658618 ref 2 fl Rpc:XN/0/ffffffff rc 0/-1
Lustre: server umount lustre-MDT0000 complete
LustreError: 34120:0:(obd_mount.c:1342:lustre_fill_super()) Unable to mount  (-34)
Lustre: DEBUG MARKER: Using TIMEOUT=20
Lustre: DEBUG MARKER: upgrade-downgrade : @@@@@@ FAIL: NAME=ncli not mounted

Issue Links

• duplicates: LU-5707 LFSCK 3: cannot load namespace LFSCK tracing file after downgrade from Lustre-2.7