[anti-censorship-alerts] [FIRING:1] Bridges down

[meskio]

Quoting Roger Dingledine (2023-06-06 22:20:20)
> On Tue, Jun 06, 2023 at 09:48:25AM +0200, meskio wrote:
> > > Quoting alertmanager at hetzner-nbg1-02.torproject.org (2023-06-05 09:36:35)
> > > > Time: 2023-06-05 07:35:51.034543026 +0000 UTC
> > > > Summary:  Too many bridgestrap failures 
> > > > Description:  The percent of functional bridges is 49.2%. 
> > > 
> > > Something is failing on bridgestrap, It has a constant ratio of 45.5% failing 
> > > bridges since some hours. I'm investigating.
> > 
> > It has recovered itself after 19h of half of the bridges failing. I didn't see 
> > any errors on the logs. Not sure what has happen, maybe a network issue.
> 
> toralf asks on #tor-relays about a drop in number of lines in the
> assignments pool file, and a corresponding spike in the number of his
> bridges that are listed as distribution strategy 'None' in onionoo.

They will appear as 'None' if not included in the assignments file.

> "there 1234 lines in 2023-06-05-11-14-55 but 1922 in 2023-06-04-15-44-55"
> 
> It seems from the timing like it might be related.
> 
> In terms of causation, the theory might be "somehow bridgestrap marked
> a bunch of bridges as down, and then rdsys stopped putting the down
> bridges into the assignments file"?

Yes, that is my understanding of the situation.

> But apparently the bridges still have the Running flag on relay-search
> and onionoo, perhaps because that's different from rdsys's notion of
> whether bridgestrap said to give it out or not?

I'm not sure how metrics works, I thought metrics was also asking bridgestrap 
for the bridge status, but maybe not as frequently as rdsys or maybe they just 
use the 'Running' flag.

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