RFR: 8378927: H3MultipleConnectionsToSameHost.java#with-continuations intermittent fails

[Daniel Fuchs]

On Mon, 2 Mar 2026 10:51:39 GMT, Daniel Jeliński <djelinski at openjdk.org> wrote:

> Raise the QUIC connection timeout in the H3MultipleConnectionsToSameHost test above the jtreg timeout.
> 
> The test failed with a QUIC connection timeout, but the reason for the timeout was not found in the logs. This kind of failure is usually caused by one of:
> - packet loss; when that happens, the congestion controller slows down the sending rate until the connection times out,
> - threading issues like races / deadlocks
> - overloaded machine; the threads might not get enough CPU time to respond before the timeout expires.
> 
> Increasing the QUIC connection timeout should mitigate the packet loss and CPU issues, and will provide additional information like thread / core dumps to help with diagnosing threading issues.

Marked as reviewed by dfuchs (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/29993#pullrequestreview-3876414522