RFR: 8349702: jdk.internal.net.http.Http2Connection::putStream needs to provide cause while cancelling stream

[Jaikiran Pai]

On Mon, 10 Feb 2025 11:04:42 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

> Fixes stream cancellation in `Http2Connection::putStream`. See comments in the ticket for details on the issue. `tier1,2` results are attached to the ticket too.

Hello Volkan, so from what I understand, before this change, we used to raise a generic `IOException` if a new request couldn't be initiated because the `Http2Connection` on which it is being raised already had some failure. With this new change, we propagate any original exception that was registered on the `Http2Connection` thus allowing any special handling of that original exception type before it gets propagated to the application code. Did I understand this correctly? 

The linked JBS issue has a `noreg-self`. I think it should instead be `noreg-hard`, since `noreg-self` is used when we change a regression test itself, which isn't the case here.

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PR Comment: https://git.openjdk.org/jdk/pull/23540#issuecomment-2650446242