Security log has a warning that needs interpretation

[okynnor]

Hi,

I have a warning and I don't know what it means. It sounds that it's related to my iSCSI drive and the fact that my FreeNAS crashed 6 hours earlier because zvol where iSCSI was out of space.

Would someone help me understand the below and if I should be concerned?

> SMP: AP CPU #3 Launched!
> SMP: AP CPU #2 Launched!
> Timecounter "TSC-low" frequency 1200022552 Hz quality 1000
> WARNING: 192.168.1.6 (iqn.2019-10.com.example:90f1d60b): no ping reply (NOP-Out) after 5 seconds; dropping connection

Message about FreeNAS rebooted

FreeNAS.mybooks.private had an unscheduled system reboot.
The operating system successfully came back online at Wed Oct 23 03:50:18 2019.

 

[dlavigne]

Looks like normal rebooting messages. Do you know what caused the system to reboot?

 

[okynnor]

Looks like normal rebooting messages. Do you know what caused the system to reboot?

What I'm more concerned about is this message in the security message:

> WARNING: 192.168.1.6 (iqn.2019-10.com.example:90f1d60b): no ping reply (NOP-Out) after 5 seconds; dropping connection

What would cause this message?

 

[okynnor]

Looks like normal rebooting messages. Do you know what caused the system to reboot?

The reboot occurred on or at when my iSCSI zvol ran out of space and Xen Orchestra was in the middle of trying to restore a differential backup. This leads me to believe that if a Zvol is out of space, FreeNAS will reboot. Is this logic deduction correct?

 

[dlavigne]

That makes sense then.

 

[okynnor]

That makes sense then.

What about this message? What does it mean?

> WARNING: 192.168.1.6 (iqn.2019-10.com.example:90f1d60b): no ping reply (NOP-Out) after 5 seconds; dropping connection

 

[dlavigne]

The iSCSI connection was not available at that time, which makes sense given the reason for the reboot.

 

[okynnor]

but the time difference between the reboot and the iSCSI message was 6 hours apart. a 5 second drop doesn't seem much but could crash a VM, right?

 

[dlavigne]

You didn't mention the time difference. You're seeing that in /var/log/messages (which does include timestamps)?

 

[okynnor]

I'm seeing that based on the email notifications I got from FreeNAS. they arrived six hours apart.

My XCP-NG Linux VM all crashed as a result. But the Windows one is still going.