[Lustre-discuss] mount mdt/mgs - file exists -17

[Dan]

Hi,

After my MDS crashed I was unable to mount the mdt/mgs.  The dmesg
output is below.  I'm unable to remove lustre modules (lustre_rmmod) and
it's listed under /proc/fs/lustre/devices but not mounted.  Rebooting
the system to try again results in a kernel panic.  Upon reset I ran
fsck which revealed no problems so I tried a --writeconf and deleted
CATALOGS but still received -17 and was unable to reboot clean or unload
modules.

Fortunately this is my test system but I'd like to understand what
happened!  Running Lustre 1.8.5 on RHEL 5.5.

cat /proc/fs/lustre/devices
7 AT osc test-OST0000-osc test-mdtlov_UUID 1

Lustre: MGS MGS started
Lustre: MGC192.168.5.100 at o2ib: Reactivating import
Lustre: MGC192.168.5.100 at o2ib: Reactivating import
Lustre: Enabling user_xattr
Lustre: test-MDT0000: Now serving test-MDT0000 on /dev/sda1 with
recovery enabled
Lustre: 5590:0:(lproc_mds.c:271:lprocfs_wr_group_upcall()) test-MDT0000:
group upcall set to /usr/sbin/l_getgroups
Lustre: test-MDT0000.mdt: set parameter
group_upcall=/usr/sbin/l_getgroups
LustreError: 5590:0:(ldlm_lib.c:331:client_obd_setup()) can't add
initial connection
LustreError: 5590:0:(obd_config.c:372:class_setup()) setup
test-OST0000-osc failed (-2)
LustreError: 5590:0:(obd_config.c:1199:class_config_llog_handler()) Err
-2 on cfg command:
Lustre:    cmd=cf003 0:test-OST0000-osc  1:test-OST0000_UUID
2:128.174.5.100 at tcp  
LustreError: 15c-8: MGC192.168.5.100 at o2ib: The configuration from log
'test-MDT0000' failed (-2). This may be the result of communication
errors between this node and the MGS, a bad configuration, or other
errors. See the syslog for more information.
LustreError: 5453:0:(obd_mount.c:1126:server_start_targets()) failed to
start server test-MDT0000: -2
LustreError: 5453:0:(obd_mount.c:1655:server_fill_super()) Unable to
start targets: -2
Lustre: Failing over test-MDT0000
Lustre: Failing over test-mdtlov
Lustre: test-MDT0000: shutting down for failover; client state will be
preserved.
Lustre: MDT test-MDT0000 has stopped.
Lustre: MGS has stopped.
Lustre: server umount test-MDT0000 complete
LustreError: 5453:0:(obd_mount.c:2050:lustre_fill_super()) Unable to
mount  (-2)

Thanks,

Dan
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