samba_dnsupdate timeouts (was Re: [PATCH] python indent bugfix in dns_hub.py)

[Stefan Metzmacher]

Hi,

> It's just that samba_dnsupdate is so slow that it hits
> the 20 seconds timeout and as a result we don't have our names
> registered in the RESOLV_WRAPPER_HOSTS file.
> 
> I added a lot of debugging to it and run only samba-ad-dc-2 but 30 times
> in a gitlab pipeline and I can reproduce the problem at least a few
> times within these 30 jobs.
> 
> In this pipeline
> https://gitlab.com/samba-team/devel/samba/pipelines/45603458
> see
> https://gitlab.com/samba-team/devel/samba/-/jobs/154237806
> 
> This (top) commit
> https://git.samba.org/?p=metze/samba/wip.git;a=commitdiff;h=4a1ec1dcd566
> with a few more:
> https://git.samba.org/?p=metze/samba/wip.git;a=shortlog;h=4a1ec1dcd5669b
> shows the problem
> 
> [2019/01/31 14:18:29.857643,  0, pid=28273] Calling DNS name update script
> [2019/01/31 14:18:29.867998,  0, pid=28273] samba_runcmd_send: Started
> process 28322 from 28273
> 
> ...
> 
> [2019/01/31 14:18:30.030683,  0, pid=28273] python3: 2019/01/31
> 14:18:29.878457: before execvp() getpid(28322) getppid(28321) - stderr
> 
> ...
> 
> [2019/01/31 14:18:45.883750,  0, pid=28273] python3: [2019/01/31
> 14:18:42.104352,  1, pid=28322] WARNING: The "server schannel" option is
> deprecated
> [2019/01/31 14:18:45.883976,  0, pid=28273] python3: INFO 2019-01-31
> 14:18:42,482 pid:28322
> /tmp/samba-testbase/b17/samba-ad-dc-2/source4/scripting/bin/samba_dnsupdate
> #113: IPs: ['127.0.0.17', 'fd00::5357:5f11']
> [2019/01/31 14:18:45.884051,  0, pid=28273] python3: INFO 2019-01-31
> 14:18:42,658 pid:28322
> /tmp/samba-testbase/b17/samba-ad-dc-2/source4/scripting/bin/samba_dnsupdate
> #113: Start delay: 11.381402900000012
> 
> 
> The startup of samba_dnsupdate takes 11 seconds for importing python
> modules and similar things.

Can this be a really busy gitlab shared runner that is swapping?

Does anyone has any idea?

Maybe giving samba_dnsupdate a 60 second timeout would be a workaround?

metze

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