[Samba] Time outs and high cpu usage after upgrading to 4.12.11

[cn at brain-biotech.de]

Hello all,
as we upgraded all our DCs to 4.13 before I could gather all the data 
for a bug report, here is what we have seen.

-- We are using the Sernet Packages
-- 4.12 on Centos 7 did not show this behaviour
-- The problem did not show after a reboot. It took 6-7 days running and 
the CPU load started to increase then. I saw some time outs on slower 
VMs. There I increased the vCPU number to 8 and I could prolong the time 
until there was a noticeable impact (Login by ssh took very long).
-- After a restart of the service everything went back to normal for 6-7 
days). Then again CPU load increased continuously.
-- Disabling audit logging also prolonged the time until we saw any 
impact. But that probably just reduced the load.
-- I suspected it has something todo with gnu-tls but could never prove it.


Regards


Christian

Am 28.02.21 um 22:42 schrieb Andrew Bartlett via samba:
> On Sun, 2021-02-28 at 16:37 +0100, cn--- via samba wrote:
>> Hello we have seen this also on 4.12 and Centos8. Only the upgrade
>> to
>> 4.13 fixed the problem for us.
> 
> That's really interesting.  I'm not aware of a deliberate change or
> fix, I would be very keen to know if a particular commit that addresses
> this is ever identified, so we can learn and perhaps lock in the
> correct behaviour with a test.
> 
> Not that I'm suggesting such tests in production, but if anybody here
> can reproduce this well enough and has the time to do a git bisect,
> either from the old working to the first failing version or from the
> first failing version to the new working one that would be awesome.
> 
> Andrew Bartlett
> 

-- 
Dr. Christian Naumer
Vice President
Unit Head Bioprocess Development

B.R.A.I.N Aktiengesellschaft
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