[LU-8771] conf-sanity test_5e: timeout on zfs umount

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Minor
• Severity: 3
• Assignee: WC Triage
• Reporter: Maloo

Description

This issue was created by maloo for Bob Glossman <[e-mail]>

This issue relates to the following test suite run: https://testing.hpdd.intel.com/test_sets/035ce17e-9bee-11e6-87ec-5254006e85c2.

The sub-test test_5e failed with the following error:

test failed to respond and timed out

seen in MDS console log:

22:00:02:INFO: task umount:10144 blocked for more than 120 seconds.
22:00:02:      Tainted: P           -- ------------    2.6.32-573.26.1.el6_lustre.g16120b8.x86_64 #1
22:00:02:"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
22:00:02:umount        D 0000000000000000     0 10144  10143 0x00000080
22:00:02: ffff88005d82fa48 0000000000000086 ffffffff00000010 ffff88005d82f9e8
22:00:02: ffff88005d82f9a8 000200000a090601 ffffffffa08ed845 0000000000000000
22:00:02: ffff8800782660b8 ffffffffa08ed845 ffff88005d1185f8 ffff88005d82ffd8
22:00:02:Call Trace:
22:00:02: [<ffffffff8153a9b2>] schedule_timeout+0x192/0x2e0
22:00:02: [<ffffffff81089fa0>] ? process_timeout+0x0/0x10
22:00:02: [<ffffffffa0884e36>] obd_exports_barrier+0xb6/0x190 [obdclass]
22:00:02: [<ffffffffa10895fb>] mdt_device_fini+0x6ab/0x12e0 [mdt]
22:00:02: [<ffffffffa0886b3d>] ? class_disconnect_exports+0x17d/0x2f0 [obdclass]
22:00:02: [<ffffffffa089f302>] class_cleanup+0x572/0xd20 [obdclass]
22:00:02: [<ffffffffa0882356>] ? class_name2dev+0x56/0xe0 [obdclass]
22:00:02: [<ffffffffa08a1616>] class_process_config+0x1b66/0x24c0 [obdclass]
22:00:02: [<ffffffffa07a5d81>] ? libcfs_debug_msg+0x41/0x50 [libcfs]
22:00:02: [<ffffffffa08a242f>] class_manual_cleanup+0x4bf/0xc90 [obdclass]
22:00:02: [<ffffffffa0882356>] ? class_name2dev+0x56/0xe0 [obdclass]
22:00:02: [<ffffffffa08d39ac>] server_put_super+0x8bc/0xcd0 [obdclass]
22:00:02: [<ffffffff81194aeb>] generic_shutdown_super+0x5b/0xe0
22:00:02: [<ffffffff81194bd6>] kill_anon_super+0x16/0x60
22:00:02: [<ffffffffa08a5616>] lustre_kill_super+0x36/0x60 [obdclass]
22:00:02: [<ffffffff81195377>] deactivate_super+0x57/0x80
22:00:02: [<ffffffff811b533f>] mntput_no_expire+0xbf/0x110
22:00:02: [<ffffffff811b5e8b>] sys_umount+0x7b/0x3a0
22:00:02: [<ffffffff8100b0d2>] system_call_fastpath+0x16/0x1b
22:00:02:Lustre: lustre-MDT0000 is waiting for obd_unlinked_exports more than 256 seconds. The obd refcount = 5. Is it stuck?

Info required for matching: conf-sanity 5e