[lustre-discuss] Errors when starting Lustre on CentOS 6.5

[Julien Rey]

Thank you Andreas for answering. However for the time being upgrading 
our lustre installation is not an option. The emergency is to be able to 
retrieve our data.

So far I tried to issue this command:

# e2fsck --mdsdb mds_database_file /dev/sdb

But then realized it was pointless as I can't run lfsck since I can't 
mount the volume with -t lustre. The system still crashes with the error 
Guillaume posted and then reboot when doing mount.lustre /dev/sdb /mdt.

In some other thread someone encountered an almost identical issue but 
with lfsck:

Message from syslogd at localhost at Nov 28 10:52:49 ...
  kernel:LustreError: 8355:0:(osd_handler.c:1017:osd_trans_start())
ASSERTION( get_current()->journal_info == ((void *)0) ) failed:
Message from syslogd at localhost at Nov 28 10:52:49 ...
  kernel:LustreError: 8355:0:(osd_handler.c:1017:osd_trans_start()) LBUG

Sep 13 15:10:28 n00a kernel: [ 8414.619833] Pid: 11696, comm: lfsck

but then managed to find a workaround by mounting the volume as ldiskfs 
and then delete some namespace file :

# mount -t ldiskfs -o rw /dev/mdt /mnt/mdt.ldiskfs
# rm -f /mnt/mdt.ldiskfs/lfsck_namespace
# umount /mnt/mdt.ldiskfs

Could this be the solution in our case ?

Cheers,

J.

Le 29/11/2018 15:40, Guillaume Postic a écrit :
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-- 
Julien REY

Plate-forme RPBS
Molécules Thérapeutiques In Silico (MTi)
Université Paris Diderot - Paris VII
tel : 01 57 27 83 95