[LU-5630] mdt_getattr_name_lock()) ASSERTION( lock != NULL )

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Major
• Affects Version/s: Lustre 2.4.2
• Labels: llnl
• Environment: Lustre 2.4.2-14chaos (see github.com/chaos/lustre)
• Severity: 3
• Assignee: Oleg Drokin
• Reporter: Christopher Morrone (Inactive)

Description

2014-09-11 21:10:30 LustreError: 0:0:(ldlm_lockd.c:402:waiting_locks_callback()) ### lock callback timer expired after 100s: evicting client at 192.168.120.199@o2ib7  ns: mdt-lsd-MDT0000_UUID lock: ffff880321a4a480/0x6bd4680b789ee41f lrc: 4/0,0 mode: PR/PR res: [0x2000112f3:0xf:0x0].0 bits 0x13 rrc: 4 type: IBT flags: 0x200000000020 nid: 192.168.120.199@o2ib7 remote: 0xf350c14aff003b28 expref: 30 pid: 17248 timeout: 6838410913 lvb_type: 0 used 0
2014-09-11 21:10:30 LustreError: 15075:0:(mdt_handler.c:1423:mdt_getattr_name_lock()) ASSERTION( lock != NULL ) failed: Invalid lock handle 0x6bd4680b789ee41f
2014-09-11 21:10:30 LustreError: 15075:0:(mdt_handler.c:1423:mdt_getattr_name_lock()) LBUG
2014-09-11 21:10:30 Pid: 15075, comm: mdt00_069

The backtrace is:

PID: 15075  TASK: ffff880d7001f540  CPU: 2   COMMAND: "mdt00_069"
 #0 [ffff880d70021938] machine_kexec+0x18b at ffffffff810391ab
 #1 [ffff880d70021998] crash_kexec+0x72 at ffffffff810c5ee2
 #2 [ffff880d70021a68] panic+0xae at ffffffff8152b247
 #3 [ffff880d70021ae8] lbug_with_loc+0x9b at ffffffffa0601f4b [libcfs]
 #4 [ffff880d70021b08] mdt_getattr_name_lock+0x18d0 at ffffffffa0e99900 [mdt]
 #5 [ffff880d70021bc8] mdt_intent_getattr+0x29d at ffffffffa0e99c5d [mdt]
 #6 [ffff880d70021c28] mdt_intent_policy+0x39e at ffffffffa0e86fde [mdt]
 #7 [ffff880d70021c68] ldlm_lock_enqueue+0x361 at ffffffffa08b8911 [ptlrpc]
 #8 [ffff880d70021cc8] ldlm_handle_enqueue0+0x4ef at ffffffffa08e1a7f [ptlrpc]
 #9 [ffff880d70021d38] mdt_enqueue+0x46 at ffffffffa0e87466 [mdt]
#10 [ffff880d70021d58] mdt_handle_common+0x647 at ffffffffa0e8c0d7 [mdt]
#11 [ffff880d70021da8] mds_regular_handle+0x15 at ffffffffa0ec7c75 [mdt]
#12 [ffff880d70021db8] ptlrpc_server_handle_request+0x398 at ffffffffa0912188 [ptlrpc]
#13 [ffff880d70021eb8] ptlrpc_main+0xace at ffffffffa091351e [ptlrpc]
#14 [ffff880d70021f48] child_rip+0xa at ffffffff8100c24a

This looks like the same assertion assertion as LU-5579, but that was presumably hit on Lustre 2.6 or later.

Issue Links

• is related to: LU-5579 MDS crashed by "mdt_check_resent_lock()) ASSERTION( lock != NULL ) failed"