rpcd_spoolss memoryleak and high cpu-usage?

[Hans Otto Lunde]

I run a samba server for a small business.
It's not connected to a Windows AD, we are not using that.
So I am not running Winbind, just smbd and nmbd.
Most clients are Windows machines with a few Mac's and Linux-clients.
Everything works fine, file sharing and printing (via cups).
What causes me to file this report is that the rpcd_spoolss-process behaves strangely.
When the server is idle, it's cpu-usage rises slowly but continously and so does its memory-usage.
Funnily, it seems to go back to normal, when people start working in the morning and use the server.

The server in question is Ubuntu server 24.04.1 LTS - just upgraded from 22.04, that did not have this problem. So the Samba version is 4.19.5.

I should think that others will experience this.
It is not a HUGE problem, but it smells like a bug to me.

Thanks for all the great work Ubuntu is doing for the open-source community!

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: samba 2:4.19.5+dfsg-4ubuntu9
ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12
Uname: Linux 6.8.0-41-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
BothFailedConnect: Yes
CasperMD5CheckResult: unknown
Date: Mon Sep 9 22:02:28 2024
NmbdLog:

SambaServerRegression: Yes
SmbConfIncluded: Yes
SmbLog:

SourcePackage: samba
TestparmExitCode: 0
UpgradeStatus: Upgraded to noble on 2024-09-06 (3 days ago)
modified.conffile..etc.init.d.apport: [modified]
mtime.conffile..etc.init.d.apport: 2024-07-22T16:59:07

[Hans Otto Lunde (ho-egmont-hs)]

I would like to hear if others can confirm this?
There is no doubt that the rpcd_spoolss-process eats up memory.
If left for some hours it will grab 1-2 gigabytes of memory.
And on a system running idle it will also slowly but surely increase it's cpu-usage.
Anyone?