Hello, Last Friday, during normal operations, our MDS froze with the following LBUG, which happens again as soon as one mounts the MDT again:
Sep 13 15:10:28 n00a kernel: [ 8414.600584] LustreError: 11696:0:(osd_handler.c:936:osd_trans_start()) ASSERTION( get_current()->journal_info == ((void *)0) ) failed: Sep 13 15:10:28 n00a kernel: [ 8414.612825] LustreError: 11696:0:(osd_handler.c:936:osd_trans_start()) LBUG Sep 13 15:10:28 n00a kernel: [ 8414.619833] Pid: 11696, comm: lfsck Sep 13 15:10:28 n00a kernel: [ 8414.619835] Sep 13 15:10:28 n00a kernel: [ 8414.619835] Call Trace: Sep 13 15:10:28 n00a kernel: [ 8414.619850] [<ffffffffa0224822>] libcfs_debug_dumpstack+0x52/0x80 [libcfs] Sep 13 15:10:28 n00a kernel: [ 8414.619857] [<ffffffffa0224db2>] lbug_with_loc+0x42/0xa0 [libcfs] Sep 13 15:10:28 n00a kernel: [ 8414.619864] [<ffffffffa0b11890>] osd_trans_start+0x250/0x630 [osd_ldiskfs] Sep 13 15:10:28 n00a kernel: [ 8414.619870] [<ffffffffa0b0e748>] ? osd_declare_xattr_set+0x58/0x230 [osd_ldiskfs] Sep 13 15:10:28 n00a kernel: [ 8414.619876] [<ffffffffa0c6ffc7>] lod_trans_start+0x177/0x200 [lod] Sep 13 15:10:28 n00a kernel: [ 8414.619881] [<ffffffffa0cbd752>] lfsck_namespace_double_scan+0x1122/0x1e50 [lfsck] Sep 13 15:10:28 n00a kernel: [ 8414.619888] [<ffffffff8136741b>] ? thread_return+0x3e/0x10c Sep 13 15:10:28 n00a kernel: [ 8414.619894] [<ffffffff81038b87>] ? enqueue_task_fair+0x58/0x5d Sep 13 15:10:28 n00a kernel: [ 8414.619899] [<ffffffffa0cb68ea>] lfsck_double_scan+0x5a/0x70 [lfsck] Sep 13 15:10:28 n00a kernel: [ 8414.619904] [<ffffffffa0cb7dfd>] lfsck_master_engine+0x50d/0x650 [lfsck] Sep 13 15:10:28 n00a kernel: [ 8414.619909] [<ffffffffa0cb78f0>] ? lfsck_master_engine+0x0/0x650 [lfsck] Sep 13 15:10:28 n00a kernel: [ 8414.619915] [<ffffffff810534c4>] kthread+0x7b/0x83 Sep 13 15:10:28 n00a kernel: [ 8414.619918] [<ffffffff810369d3>] ? finish_task_switch+0x48/0xb9 Sep 13 15:10:28 n00a kernel: [ 8414.619924] [<ffffffff8101092a>] child_rip+0xa/0x20 Sep 13 15:10:28 n00a kernel: [ 8414.619928] [<ffffffff81053449>] ? kthread+0x0/0x83 Sep 13 15:10:28 n00a kernel: [ 8414.619931] [<ffffffff81010920>] ? child_rip+0x0/0x20 I originally had the LFSCK launched in "dry-run" mode: lctl lfsck_start --device lustre-1-MDT0000 --dryrun on --type namespace The LFSCK was reported completed (I was 'watch[ing] -n 1' on a terminal) before the LBUG popped-up; now, I can't even get any output cat /proc/fs/lustre/mdd/lustre-1-MDT0000/lfsck_namespace # just hang there indefinitely I remember seing a lfsck_namespace file in the MDT underlyding LDISKFS; is there anything sensible I can do with it (e.g. would deleting it solve the situation) ? What else could I do ? Thanks for your answers and best regards, Cédric D. PS: I had this message originally posted on HPDD-discuss mailing list and just realized it was the wrong place; sorry for any crossposting case _______________________________________________ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org