[LU-9577] mount.lustre: mount /dev/sde at /mnt/testfs-MDT0001 failed: File exists

• Type: Bug
• Resolution: Duplicate
• Priority: Blocker
• Affects Version/s: Lustre 2.10.0
• Environment: Build Version: 2.9.58_22_gdb59ecb
• Severity: 3
• Assignee: Hongchao Zhang
• Reporter: Brian Murrell (Inactive)

Description

During a DNE test we got an error:

# mount -t lustre /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_disk11 /mnt/testfs-MDT0001

mount.lustre: increased /sys/block/sde/queue/max_sectors_kb from 512 to 16384
mount.lustre: mount /dev/sde at /mnt/testfs-MDT0001 failed: File exists
# echo $?
17

The messages log reported:

May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LDISKFS-fs (sdc): mounted filesystem with ordered data mode. Opts: errors=remount-ro
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LDISKFS-fs (sdb): mounted filesystem with ordered data mode. Opts: errors=remount-ro
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LDISKFS-fs (sdc): mounted filesystem with ordered data mode. Opts: user_xattr,errors=remount-ro,no_mbcache,nodelalloc
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LDISKFS-fs (sdb): mounted filesystem with ordered data mode. Opts: user_xattr,errors=remount-ro,no_mbcache,nodelalloc
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: ctl-testfs-MDT0000: No data found on store. Initialize space
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: testfs-MDT0000: new disk, initializing
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: testfs-MDT0000: Imperative Recovery not enabled, recovery window 300-900
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: ctl-testfs-MDT0000: super-sequence allocation rc = 0 [0x0000000200000400-0x0000000240000400]:0:mdt
May 31 10:51:38 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: cli-ctl-testfs-MDT0002: Allocated super-sequence [0x0000000240000400-0x0000000280000400]:2:mdt]
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: Failing over testfs-MDT0002
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: Skipped 2 previous similar messages
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 11-0: testfs-MDT0000-osp-MDT0002: operation mds_disconnect to node 0@lo failed: rc = -107
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: Skipped 3 previous similar messages
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LDISKFS-fs (sde): mounted filesystem with ordered data mode. Opts: errors=remount-ro
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LDISKFS-fs (sde): mounted filesystem with ordered data mode. Opts: user_xattr,errors=remount-ro,no_mbcache,nodelalloc
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: server umount testfs-MDT0002 complete
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(genops.c:334:class_newdev()) Device MDS already exists at 5, won't add
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(obd_config.c:366:class_attach()) Cannot create device MDS of type mds : -17
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(obd_mount.c:194:lustre_start_simple()) MDS attach error -17
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(obd_mount_server.c:1297:server_start_targets()) failed to start MDS: -17
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(obd_mount_server.c:1840:server_fill_super()) Unable to start targets: -17
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(obd_mount_server.c:1554:server_put_super()) no obd testfs-MDT0001
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(obd_mount_server.c:135:server_deregister_mount()) testfs-MDT0001 not registered
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: Lustre: Skipped 1 previous similar message
May 31 10:51:39 lotus-45vm15.lotus.hpdd.lab.intel.com kernel: LustreError: 28862:0:(obd_mount.c:1501:lustre_fill_super()) Unable to mount (-17)

Unfortunately this test harness is not really intended to test Lustre itself and therefore not very well tooled to have gathered any more useful information (i.e. no Lustre debugging) than what I have here.

Issue Links

• duplicates: LU-5020 OST can be all mounted successfully in parallel mount scenario