nmbd high CPU on TrueNAS Core

[waterlou]

Hi,

I've just upgraded from FreeNAS 11 to TrueNAS Core 12 Beta. Everything works fine. But I found that nmbd had unusual CPU loading even when idle. Is this a bug or wrong setting?

 

[anodos]

Can you please PM me a debug file? System->Advanced->Save Debug

 

[waterlou]

Here is the debug file.

 

[anodos]

Interesting. I don't see an obvious misconfiguration. Do you mind sending kill -6 <nmbd pid> and then sending me the core file (/var/db/system/cores/nmbd.core) via private message?

 

[waterlou]

FYI, if I run `service nmbd restart`. The system actually failed to stop the daemon until I kill the job manually.

 

[anodos]

Created jira ticket here: https://jira.ixsystems.com/browse/NAS-106805
I think I identified the issue, but I might not have a fix ready for BETA2. You can turn off nmbd in the GUI by unchecking "NetBIOS NS" in Network->Global Configuration.

 

[waterlou]

Cool!. Thank you very much.

 

[anodos]

Cool!. Thank you very much.

No problem. If I have time today I will see about sending you a WIP patched version of nmbd for testing (will have a potential fix and very verbose logging).

 

[NP_]

Hey,
Have a look at the Jira issue, I'm pretty sure this is relates to how many IPv4 addresses are configured on network interfaces.
Your dump shows there are 9 on your system, one for igb0 and a bunch of jails.
Could you stop at least 4 jails, restart nmbd, and see if CPU usage is normal?
Cheers