RFR: 8367067: Improve exception handling in HttpRequest.BodyPublishers

[Chen Liang]

On Mon, 8 Sep 2025 08:10:06 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

>> Improves exception handling of built-in `HttpClient.BodyPublisher`s to ensure exceptions get propagated in a way compliant with the reactive specification.
>
> src/java.net.http/share/classes/jdk/internal/net/http/RequestPublishers.java line 357:
> 
>> 355:                     haveNext = false;
>> 356:                     need2Read = false;
>> 357:                     throw new IOException(e);
> 
> We don't convert `IOE`s to `UncheckedIOE`s anymore. This effectively makes the `HttpClientImpl::send` exception translation logic branching on `if (throwable instanceof IOException)` to kick in.

Then why can't we simply `throw e` instead?

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PR Review Comment: https://git.openjdk.org/jdk/pull/26876#discussion_r2330226401