Issue

• There was a SAN outage and after that started seeing following error messages in logs files.

kernel: INFO: task jbd2/dm-14-8:1635 blocked for more than 120 seconds.
kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kernel: jbd2/dm-14-8 D 0000000000000001 0 1635 2 0x00000080
kernel: ffff8800ad407d20 0000000000000046 ffff8800ad407ca0 ffffffff811a8857
kernel: ffff8800adbd6400 ffff8800358366e8 0000000000002783 ffff8800adbfe040
kernel: ffff8800adbfe5f8 ffff8800ad407fd8 000000000000fb88 ffff8800adbfe5f8
kernel: Call Trace:
kernel: [] ? __set_page_dirty+0x87/0xf0
kernel: [] ? prepare_to_wait+0x4e/0x80
kernel: [] jbd2_journal_commit_transaction+0x19f/0x14b0 [jbd2]
kernel: [] ? __switch_to+0xd0/0x320
kernel: [] ? lock_timer_base+0x3c/0x70
kernel: [] ? autoremove_wake_function+0x0/0x40
kernel: [] kjournald2+0xb8/0x220 [jbd2]
kernel: [] ? autoremove_wake_function+0x0/0x40
kernel: [] ? kjournald2+0x0/0x220 [jbd2]
kernel: [] kthread+0x96/0xa0
kernel: [] child_rip+0xa/0x20
kernel: [] ? kthread+0x0/0xa0
kernel: [] ? child_rip+0x0/0x20