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QUIC: stalled connection rejection causing stalled connection reopening #2549
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Since I can somewhat reliably reproduce it, I'll try to get traces and so on on a mainline build. |
I had some tests on my side using chrome as browser but I cannot reproduce it for now. As a side info for us related to your screenshot, the issue seems to happen when opening a new connection as graphs for request on connection reuse are different (no DNS/Initial connection/SSL display). |
Yeah it is quite tricky alas, and seems to require multiple factors which I'm just lucky to have for some reason at home with the OS, browser, ISP, etc. Have very limited time for testing recently, but I won't forget to get extra details. |
Detailed Description of the Problem
This is a tricky one, and it's extremely difficult to reliably reproduce or be sure what exactly is happening, however I noticed (and so did some users) the following behaviour occasionally:
It shows up like so in a browser:
So on one side, there's a 4s timeout that doesn't trigger reliably.
Expected Behavior
There's no random 4s timeout to connections.
Steps to Reproduce the Behavior
Unsure, my best repro so far is to open a fresh browser instance, then navigate to my site and observe in maybe 50% of cases that random 4s stall.
Do you have any idea what may have caused this?
Not sure, but I know it's a regression. One day I realized it, and just assumed it was a DNS stall or something on my computer. I only investigated much later and unfortunately don't know exactly when it started.
Do you have an idea how to solve the issue?
No response
What is your configuration?
Output of
haproxy -vv
Last Outputs and Backtraces
No response
Additional Information
I will update my HAProxy version first and see if something changes, but I figured I ought to at least open the issue already.
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