Re: OFFLIST Re: systemd's connections to /run/systemd/private ?

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On Tue, Jul 9, 2019 at 4:28 PM Brian Reichert <reichert@xxxxxxxxxxx> wrote:
On Tue, Jul 09, 2019 at 11:21:13AM +0100, systemd-devel@xxxxxxxxxxxxxxxxxxxxx wrote:
> Hi Brian
>
> I feel embarrassed at having recommended you to join the systemd-devel
> list :( I don't understand why nobody is responding to you, and I'm not
> qualified to help!

I appreciate the private feedback.  I recognize this is an all-volunteer
ecosystem, but I'm not used to radio silence. :/

> There is a bit of anti-SUSE feeling for some reason
> that I don't really understand, but Lennart in particular normally
> seems to be very helpful, as does Zbigniew.

It seems that Lennart tends to process his mailing-list inbox only every couple of weeks. He's a bit more active on GitHub however.

The rest of us are probably either waiting for a dev to make a comment, and/or wondering why such massive numbers of `systemctl` are being run on your system in the first place.
 

I'm new to this list, so haven't seen any anti-SLES sentiments as
of yet.  But, based on the original symptoms I reported, this occurs
on many distributions.

> Perhaps it would be worth restating your problem. I would suggest
> sticking to the facts of the problem as you have experienced them and
> post the full logs somewhere so that people can see the problem. What is
> logged when a server fails to reboot, for example.

I'd love to restate the problem in a way that's tractable, and
distinct from other people's reports of these symptoms.  If you
search the Internet for forum messages:

  systemd "Too many concurrent connections, refusing"

You'll see a lot of hits.  The only solutions I've seen to date is
the systemd maintainers bumping up a hard-coded constant, a few
times over the last few years.

(The fact that they've adjusted it at least twice, but never went
so far as to make it a tunable in a config file somewhere is
worrisome.)

I think there was a general expectation that almost nothing would *use* the private socket, except for `systemctl` in rare situations where the general D-Bus system bus is not [yet] available. Instead, all control (especially where efficiency was important) would flow through the main bus connection and wouldn't ever come close to hitting the private-connection cap.

(That said, `systemctl` was seemingly changed post-v226 (4fbd7192c5) to always try the private socket first.)

On Tue, Jul 9, 2019, 22:29 Brian Reichert <reichert@xxxxxxxxxxx> wrote:
On Tue, Jul 09, 2019 at 06:20:02PM +0100, systemd-devel@xxxxxxxxxxxxxxxxxxxxx wrote:

> Posting private messages to a public list is generally considered very
> RUDE.

I agree, and I apologize.

The message I received, and replied to, did not come from a private
email address; it apparently came from the mailing list software,
and I did not realize that until I hit 'reply':

  Date: Tue, 9 Jul 2019 11:21:13 +0100
  From: systemd-devel@xxxxxxxxxxxxxxxxxxxxx
  To: Brian Reichert <reichert@xxxxxxxxxxx>
  Subject: OFFLIST Re: [systemd-devel] systemd's connections to
   /run/systemd/private ?


That's quite an odd glitch. Why would a private, offlist message come from the mailing list software (or be made to appear as if it came from the mailing list software)?

--
Mantas Mikulėnas
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