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  1. Minecraft: Java Edition
  2. MC-117086

Uses IPv6 over IPv4

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 1.12.2
    • Minecraft 1.11.2
    • OS:
      Ubuntu 16.04.2 LTS

      Java:
      openjdk version "1.8.0_121"
      OpenJDK Runtime Environment (build 1.8.0_121-8u121-b13-0ubuntu1.16.04.2-b13)
      OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)
    • Confirmed

      Using the environment as described, java has preferential treatment to opening an IPv6 port over IPv4. As described here, this was a fix: http://notes.richdougherty.com/2011/09/minecraft-server-and-ipv6.html. This; however, only seems to work up to MC version 1.7.10.

      Having tried the latest release of 1.8, 1.9. 1.10, and 1.11.2, this does not work.

      I have the -Djava.net.preferIPv4Stack=true set for both but only 1.7.10 seems to take it.

      Attached is an image of both 1.7.10 and 1.11.2, any help would be much appreciated.

        1. MC 1.11.2 TCP.png
          79 kB
          TheHyperSoldier
        2. MC 1.7.10 TCP.png
          59 kB
          TheHyperSoldier

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            TheHyperSoldier TheHyperSoldier
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              Created:
              Updated:
              Resolved: