Could someone please let me know if the following is a known bug and if any patches are available for this bug. I tried looking in bugzilla for the following bug but couldn''t find anything. May 20 23:09:02 lustre3 kernel: LustreError: 7108:0:(lustre_dlm.h:902:check_res_locked()) ASSERTION(spin_is_locked(&res->lr_lock)) failed May 20 23:09:02 lustre3 kernel: LustreError: 7108:0:(lustre_dlm.h:902:check_res_locked()) LBUG May 20 23:09:02 lustre3 kernel: Lustre: 7108:0:(linux-debug.c:222:libcfs_debug_dumpstack()) showing stack for process 7108 May 20 23:09:02 lustre3 kernel: ll_mdt_116 R running task 0 7108 2 (L-TLB) May 20 23:09:02 lustre3 kernel: ffff8103dff55e50 ffff810307f20740 ffffffff881f6dbd ffff810354840800 May 20 23:09:02 lustre3 kernel: ffff810160767cf8 ffffffff881f4a56 ffff8103548409b0 0000000000000000 May 20 23:09:02 lustre3 kernel: ffff8103dff55e10 ffffffff8022f277 0000000300000000 ffff8103548409a8 May 20 23:09:02 lustre3 kernel: Call Trace: May 20 23:09:02 lustre3 kernel: [<ffffffff881f4a56>] :libcfs:lcw_update_time+0x16/0x100 May 20 23:09:02 lustre3 kernel: [<ffffffff8022f277>] __wake_up_common+0x47/0x80 May 20 23:09:02 lustre3 kernel: [<ffffffff88336aa0>] :ptlrpc:ptlrpc_main+0x8d0/0x14f0 May 20 23:09:02 lustre3 kernel: [<ffffffff8029ca84>] filp_close+0x54/0x90 May 20 23:09:02 lustre3 kernel: [<ffffffff80232910>] default_wake_function+0x0/0x10 May 20 23:09:03 lustre3 kernel: [<ffffffff8020ad68>] child_rip+0xa/0x12 May 20 23:09:04 lustre3 kernel: [<ffffffff883361d0>] :ptlrpc:ptlrpc_main+0x0/0x14f0 May 20 23:09:04 lustre3 kernel: [<ffffffff8020ad5e>] child_rip+0x0/0x12 TIA Nirmal