Robin, there's also an ongoing thread with Firefox which has the same issues, 
especially with post/put requests in 1.8.2, you might wanna keep an eye on that 
one as well

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________________________________
From: Robin Anil <[email protected]>
Sent: Thursday, December 28, 2017 9:36:56 AM
To: [email protected]
Subject: Re: HAProxy 1.8 takes too long to update new config

I can isolate that to http2, not threads at v1.8.2

Separately, I am seeing a lot of intermittent failures with POST/PUT requests, 
I see the following returned from haproxy.
<html><body><h1>400 Bad request</h1>
Your browser sent an invalid request.
</body></html>

I can verify these requests never hit the backend.






On Thu, Dec 28, 2017 at 1:47 AM Robin Anil 
<[email protected]<mailto:[email protected]>> wrote:
In Http/2 mode with threads enabled, updating the config on a live serving 
haproxy server takes several minutes.

If I turn this off, the update of config is near instantaneous.

The config change itself is just adding a newline in the file. So it feels like 
haproxy is waiting for connections to close down or something...

My question is, is this a known behavior? Definitely not desired, not unless 
the stats page has some indicator that update is happening and connections are 
being migrated over or something.

Robin

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