Still getting these errors - all hardware was replaced only SSD drives were old ;(
INFO: task qmail-queue:7091 blocked for more than 120 seconds.
Not tainted 2.6.32-504.30.3.el6.x86_64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
qmail-queue D 0000000000000003 0 7091 7090 0x00000080
ffff88031b30fdc8 0000000000000082 ffff88031b30fd90 ffff88031b30fd8c
000000000000000e ffff88063fc24780 000000a2c09d83a0 ffff8800282f58c0
0000000000000400 00000001000618c3 ffff8806333d1068 ffff88031b30ffd8
Call Trace:
[<ffffffffa02255a5>] jbd2_log_wait_commit+0xc5/0x140 [jbd2]
[<ffffffff8109ec20>] ? autoremove_wake_function+0x0/0x40
[<ffffffffa0225938>] jbd2_complete_transaction+0x68/0xb0 [jbd2]
[<ffffffffa0256061>] ext4_sync_file+0x121/0x1d0 [ext4]
[<ffffffff811c0c51>] vfs_fsync_range+0xa1/0x100
[<ffffffff811c0d1d>] vfs_fsync+0x1d/0x20
[<ffffffff811c0d5e>] do_fsync+0x3e/0x60
[<ffffffff811c0db0>] sys_fsync+0x10/0x20
[<ffffffff8100b0d2>] system_call_fastpath+0x16/0x1b