On Tue, 19 Sep 2023 00:03:27 GMT, Liam Miller-Cushon <cus...@openjdk.org> wrote:
>> Please consider this fix for >> [JDK-8313804](https://bugs.openjdk.org/browse/JDK-8313804), which adds >> support to JDWP for `-Djava.net.preferIPv6Addresses=system`. Previously it >> only handled `-Djava.net.preferIPv6Addresses=true` and >> `-Djava.net.preferIPv6Addresses=false`. > > Liam Miller-Cushon has updated the pull request incrementally with one > additional commit since the last revision: > > Review feedback The order of the `addInfo`s is determined by `getaddrinfo()`, which is supposed to sort the results according to [RFC 6724](https://datatracker.ietf.org/doc/html/rfc6724). `system` is supposed to [preserve that order](https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/net/doc-files/net-properties.html) instead of re-ordering them. There's some related discussion in [JDK-8170568](https://bugs.openjdk.org/browse/JDK-8170568) about use-cases that IPv4-first and IPv6-first don't support. The bug details some edge cases that still aren't well supported, but in the cases I've seen `-Djava.net.preferIPv6Addresses=system` is usually fine, aside from this issue with JDWP ignoring that setting. ------------- PR Comment: https://git.openjdk.org/jdk/pull/15796#issuecomment-1724866175
