Details
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Bug
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Resolution: Fixed
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Major
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Lustre 2.4.0
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x86_64 MDS with ZFS backend
Kernel 2.6.32-358.6.1.3chaos.ch5.1.x86_64
Lustre 2.4.0-RC2_5chaos
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3
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9440
Description
MDS was up and running a production MDT and MGS. I created and mounted a second MDT dataset in the pool for testing purposes. mount.lustre crashed with the following backtrace.
PID: 91831 TASK: ffff8800a1031500 CPU: 2 COMMAND: "mount.lustre"
#0 [ffff881010da97a0] machine_kexec at ffffffff81035bfb
#1 [ffff881010da9800] crash_kexec at ffffffff810c0932
#2 [ffff881010da98d0] panic at ffffffff8150d943
#3 [ffff881010da9950] lbug_with_loc at ffffffffa05abf4b [libcfs]
#4 [ffff881010da9970] llog_osd_declare_create at ffffffffa070147f [obdclass]
#5 [ffff881010da99d0] llog_declare_create at ffffffffa06cbd41 [obdclass]
#6 [ffff881010da9a10] llog_open_create at ffffffffa06cc99f [obdclass]
#7 [ffff881010da9a60] mdd_prepare at ffffffffa0ddab4c [mdd]
#8 [ffff881010da9af0] mdt_prepare at ffffffffa0e3013a [mdt]
#9 [ffff881010da9b50] server_start_targets at ffffffffa074ab26 [obdclass]
#10 [ffff881010da9c90] server_fill_super at ffffffffa074c104 [obdclass]
#11 [ffff881010da9d70] lustre_fill_super at ffffffffa071c818 [obdclass]
#12 [ffff881010da9da0] get_sb_nodev at ffffffff81183ecf
#13 [ffff881010da9de0] lustre_get_sb at ffffffffa0714285 [obdclass]
#14 [ffff881010da9e00] vfs_kern_mount at ffffffff811834eb
#15 [ffff881010da9e50] do_kern_mount at ffffffff81183692
#16 [ffff881010da9ea0] do_mount at ffffffff811a3892
#17 [ffff881010da9f20] sys_mount at ffffffff811a3f20
#18 [ffff881010da9f80] system_call_fastpath at ffffffff8100b072
RIP: 00002aaaab1d809a RSP: 00007fffffff9068 RFLAGS: 00010202
RAX: 00000000000000a5 RBX: ffffffff8100b072 RCX: 0000000001000000
RDX: 000000000040b45f RSI: 00007fffffffc0d8 RDI: 000000000061d450
RBP: 0000000000000000 R8: 000000000061d470 R9: 0000000000000000
R10: 0000000001000000 R11: 0000000000000202 R12: 0000000000610c98
R13: 0000000000610c90 R14: 000000000061d470 R15: 0000000000000000
ORIG_RAX: 00000000000000a5 CS: 0033 SS: 002b
Lustre: ctl-ackack-MDT0000: No data found on store. Initialize space Lustre: srv-ackack-MDT0000: No data found on store. Initialize space Lustre: ackack-MDT0000: Initializing new disk LustreError: 11-0: ackack-MDT0000-lwp-MDT0000: Communicating with 0@lo, operation mds_connect failed with -11. Lustre: ackack-MDT0000: Imperative Recovery enabled, recovery window shrunk from 300-900 down to 150-450 LustreError: 91831:0:(dt_object.h:1301:dt_declare_insert()) ASSERTION( dt->do_index_ops ) failed: LustreError: 91831:0:(dt_object.h:1301:dt_declare_insert()) LBUG Pid: 91831, comm: mount.lustre