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

[Andrew Bartlett]

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

-- 
Andrew Bartlett (he/him)       https://samba.org/~abartlet/
Samba Team Member (since 2001) https://samba.org
Samba Team Lead, Catalyst IT   https://catalyst.net.nz/services/samba

Samba Development and Support, Catalyst IT - Expert Open Source
Solutions