On Tue, 25 Nov 2025 14:38:01 GMT, Daniel Fuchs <[email protected]> wrote:

> The issue here occurs when the connection gets closed just before the 
> `Http3ExchangeImpl` gets created. In that case the h3 stream reference 
> counter gets incremented, but due to the connection being already closed 
> Http3ExchangeImpl::close will not be invoked, even though the CF returned to 
> the user has been correctly completed with the appropriate exception. Not 
> calling `Http3ExchangeImpl::close` after the reference counter has been 
> incremented prevents that reference counter from being properly decremented. 
> This in turn causes `HttpClient::close()` to wait forever.
> 
> The fix is to double-check that the connection is still open after having 
> added the exchange to the connection's exchange map. If the connection is 
> still opened, we can start the exchange. Otherwise we mark it as unprocessed 
> and close it.

Marked as reviewed by djelinski (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28494#pullrequestreview-3524368077

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