[LU-4877] mdt_fix_reply()) ASSERTION( md_packed > 0 ) failed

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.6.0, Lustre 2.5.2
• Affects Version/s: Lustre 2.6.0
• Labels: dne2 migration
• Severity: 3
• Assignee: Mikhail Pershin
• Reporter: John Hammond

Description

I see this running racer on 2.5.57-72-g69ddb2e. I used MDSCOUNT=6 and modified file_create.sh to do less IO by setting SIZE=$((RANDOM % 4)).

LustreError: 14686:0:(mdt_reint.c:1446:mdt_reint_migrate_internal()) lustre-MDT0003: can n
ot migrate striped dir [0x340000401:0xf:0x0]: rc = -1
LustreError: 14686:0:(mdt_lib.c:633:mdt_fix_reply()) ASSERTION( md_packed > 0 ) failed: 
LustreError: 14686:0:(mdt_lib.c:633:mdt_fix_reply()) LBUG
Pid: 14686, comm: mdt01_001

Call Trace:
 [<ffffffffa02a9895>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
 [<ffffffffa02a9e97>] lbug_with_loc+0x47/0xb0 [libcfs]
 [<ffffffffa0c15630>] mdt_fix_reply+0x5d0/0x6a0 [mdt]
 [<ffffffffa0bfee98>] mdt_reint_internal+0x548/0x7c0 [mdt]
 [<ffffffffa0bff69b>] mdt_reint+0x6b/0x120 [mdt]
 [<ffffffffa06e39ac>] tgt_request_handle+0x23c/0xac0 [ptlrpc]
 [<ffffffffa069298a>] ptlrpc_main+0xd1a/0x1980 [ptlrpc]
 [<ffffffffa0691c70>] ? ptlrpc_main+0x0/0x1980 [ptlrpc]
 [<ffffffff81096a36>] kthread+0x96/0xa0
 [<ffffffff8100c0ca>] child_rip+0xa/0x20
 [<ffffffff810969a0>] ? kthread+0x0/0xa0
 [<ffffffff8100c0c0>] ? child_rip+0x0/0x20

Issue Links

• is related to: LU-5429 insanity test_1: FAIL: Start of /dev/lvm-Role_MDS/P1 on mds1 failed 5