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java.net.preferIPv6Addresses is documented as supporting three values: true, false, and system: https://github.com/openjdk/jdk/blob/6d185296161606edbc9f737a6b1b27496add9367/src/java.base/share/classes/java/net/doc-files/net-properties.html#L55-L63

The JDWP implementation reads preferIPv6Addresses, but it only handles the 'true' and 'false' values: https://github.com/openjdk/jdk/blob/6d185296161606edbc9f737a6b1b27496add9367/src/jdk.jdwp.agent/share/native/libdt_socket/socketTransport.c#L1370-L1371

JDWP should be updated to handle -Djava.net.preferIPv6Addresses=system, and avoid re-ordering the address returned by getaddrinfo in that case.

relates to

JDK-8250630 test/jdk/com/sun/jdi/JdwpListenTest.java fails on Alpine Linux

JDK-8317804 com/sun/jdi/JdwpAllowTest.java fails on Alpine 3.17 / 3.18

JDK-8016521 InetAddress should not always re-order addresses returned from name service

JDK-8221681 Improved IPv6 Support

JDK-8184770 JDWP support for IPv6

links to

Commit openjdk/jdk/9291b46b

Review openjdk/jdk/15796

Review(master) openjdk/jdk17u-dev/3567

Review(master) openjdk/jdk21u-dev/1773

(4 links to)