[LU-13249] MDS getting: LustreError: 5095:0:(llog_osd.c:1244:llog_osd_open ()) ASSERTION( dt ) failed:

• Status: Open
• Project: Lustre
• Affects Version/s: Lustre 2.13.0
• Type: Bug
• Priority: Minor
• Reporter: Åke Sandgren
• Assignee: WC Triage
• Resolution: Unresolved

Environment

Ubuntu 18.04 server

• Severity: 3

Description

I got hit by this LBUG trying to startup the MDS. I probably did something wrong that caused this. Reporting just in case.

Couldn't find a clear match to an existing case.

 

[ 147.518774] LustreError: 5095:0:(llog_osd.c:1244:llog_osd_open
()) ASSERTION( dt ) failed:
[ 147.528023] LustreError: 5095:0:(llog_osd.c:1244:llog_osd_open()) LBUG

 

[ 147.572606] lbug_with_loc+0x89/0x90 [libcfs]
[ 147.577483] llog_osd_open+0x7ce/0x1030 [obdclass]
[ 147.582849] ? lu_object_put+0x275/0x3c0 [obdclass]
[ 147.588291] ? _cond_resched+0x19/0x40
[ 147.592488] llog_open+0x157/0x420 [obdclass]
[ 147.597356] lod_sub_prep_llog+0x26d/0x716 [lod]
[ 147.602527] lod_process_config+0x1236/0x1450 [lod]
[ 147.607977] ? osp_key_init+0x3f/0x130 [osp]
[ 147.612759] ? lu_context_init+0xaa/0x180 [obdclass]
[ 147.618318] class_process_config+0x1aa6/0x2810 [obdclass]
[ 147.624454] ? target_name2index+0x99/0xb0 [obdclass]
[ 147.630108] ? server_name2index+0x63/0xa0 [obdclass]
[ 147.635760] class_config_llog_handler+0x969/0x16f0 [obdclass]
[ 147.642287] llog_process_thread+0x525/0x1920 [obdclass]
[ 147.648230] ? lu_context_init+0xaa/0x180 [obdclass]
[ 147.653784] llog_process_thread_daemonize+0x9f/0xe0 [obdclass]

Comments

[Åke Sandgren]

Probably caused by me shooting myself in the foot.

 

After a  set of --writeconf, things are working again.