Strange Log Report -- Need Help identivi

[wHyEt]

Apr 27 00:09:58 FreeNas lock order reversal:
Apr 27 00:09:58 FreeNas 1st 0xfffff8032c56d418 tmpfs (tmpfs) @ /freenas-releng/freenas/_BE/os/sys/kern/vfs_mount.c:1329
Apr 27 00:09:58 FreeNas 2nd 0xfffff803320c6d50 syncer (syncer) @ /freenas-releng/freenas/_BE/os/sys/kern/vfs_subr.c:2686
Apr 27 00:09:58 FreeNas stack backtrace:
Apr 27 00:09:58 FreeNas #0 0xffffffff80b6fbb0 at witness_debugger+0x70
Apr 27 00:09:58 FreeNas #1 0xffffffff80b6fa46 at witness_checkorder+0xe76
Apr 27 00:09:58 FreeNas #2 0xffffffff80ae02a1 at lockmgr_lock_fast_path+0x1b1
Apr 27 00:09:58 FreeNas #3 0xffffffff811eb8e1 at VOP_LOCK1_APV+0xe1
Apr 27 00:09:58 FreeNas #4 0xffffffff80be9c97 at _vn_lock+0x67
Apr 27 00:09:58 FreeNas #5 0xffffffff80bda367 at vputx+0x1a7
Apr 27 00:09:58 FreeNas #6 0xffffffff80bd1a3a at dounmount+0x4ea
Apr 27 00:09:58 FreeNas #7 0xffffffff80bd14c0 at sys_unmount+0x310
Apr 27 00:09:58 FreeNas #8 0xffffffff8101a712 at amd64_syscall+0x792
Apr 27 00:09:58 FreeNas #9 0xffffffff80ff50cd at fast_syscall_common+0x101

 

[wHyEt]

Hi All,
sorry vor the Bad post I didn't know that pushing the Enter button sends right away. And I couldn't find out how to change/or edit.

To my problem, I have since some days now, strange log messages and I'm trying to find out from what this comes. Can somebody help me?

The FreeNAS Specs are:

CPU:
Intel(R) Core(TM) i3-7100 CPU @ 3.90GHz
RAM:
24 GB
HDD: 3 x 3TB WD Red
1x 3TB Seagate
Running 2 VMs

Thanks in advance
Whyet