RFR: 8376479: Http3 test server thread deadlock in ThrowingPublishersInRequest

[Daniel Jeliński]

On Tue, 27 Jan 2026 15:00:01 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

>> This fixes a deadlock between the thread that reads from the RequestBodyInputStream and the thread that tries to close it in response to a stream reset. See the linked JBS ticket for details.
>> 
>> Tier1 and tier2 tests continue to pass. I verified that with this change there are no busy threads at the end of the test.
>
> test/jdk/java/net/httpclient/lib/jdk/httpclient/test/lib/http3/Http3ServerStreamImpl.java line 331:
> 
>> 329:             }
>> 330:             ByteBuffer buffer = current();
>> 331:             if (buffer == QuicStreamReader.EOF) {
> 
> Assume `current()` has failed and called `close(io)`, which registered `error`. If `buffer == EOF` (line 331) doesn't hold — which, AFAICT, it can — we will return `buffer.get() & 0xFF`. I guess this would be unexpected, right?

Right. I'll change that; nothing in the `InputStream` spec states that the stream must be left in an unusable state after an exception, so I'll just stop setting the error here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29448#discussion_r2733008147