On Fri, 7 Nov 2025 17:58:42 GMT, Daniel Fuchs <[email protected]> wrote:

>> Oh sorry I meant to just remove this line. I thought it was better to not 
>> configure HTTP_3_URI_ONLY on the request in order to trigger the fallback on 
>> TCP. So something might actually respond. If something responds then we 
>> could get a response. On the other hand this might impacts other tests that 
>> might run on the machine...
>> hmmm... maybe I should fix that.
>
> The test now creates a TCP ServerSocket bound to the same port and which will 
> close accepted connections. That should ensure safe fallback on TCP. If the 
> ServerSocket cannot be created (address already in use) then the request will 
> be configured with HTTP3_URI_ONLY to prevent fallback to TCP.

Hello Daniel, I think configuring the request to be just `HTTP3_URI_ONLY` and 
then verify that the request failed with this log message would be enough. But 
it's OK in the current proposed form too.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28196#discussion_r2509830160

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