On Thu, 5 Mar 2026 06:43:09 GMT, SendaoYan <[email protected]> wrote: >> The issue hasd been observed when testing with fastdebug builds. >> >> The test was not configuring the HTTP/3 request with HTTP_3_URI_ONLY, >> although it uses an HTTP/3 only server. As a result, the client can attempt >> to fallback to TCP after a reasonable (and short) timeout if the QUIC >> handshake is not fast enough. However since the server is HTTP/3 only >> there's no TCP server to fallback to. >> >> Configuring the HTTP/3 request with HTTP_3_URI_ONLY ensures that there's no >> TCP fallback, and that the HTTP/3 connection attempt will make use of the >> full default QUIC timeout. > > Before apply the proposed patch, test intermittent fails, failure probability > about 1/100. > After apply the proposed patch, test run 2k times and all passed.
Thanks a lot @sendaoYan for verifying the fix! It's very much appreciated. ------------- PR Comment: https://git.openjdk.org/jdk/pull/30051#issuecomment-4004087485
