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  1. JDK
  2. JDK-8200719

Cannot connect to IPv6 host when exists any active network interface without IPv6 address

    Details

    • Subcomponent:
    • Resolved In Build:
      b10
    • CPU:
      x86_64
    • OS:
      os_x

      Backports

        Description

        FULL PRODUCT VERSION :
        java version "10" 2018-03-20
        Java(TM) SE Runtime Environment 18.3 (build 10+46)
        Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10+46, mixed mode)

        ADDITIONAL OS VERSION INFORMATION :
        Darwin MacBook-Pro-de-Joel.local 17.4.0 Darwin Kernel Version 17.4.0: Sun Dec 17 09:19:54 PST 2017; root:xnu-4570.41.2~1/RELEASE_X86_64 x86_64

        EXTRA RELEVANT SYSTEM CONFIGURATION :
        WiFi Interface: IPv4 DHCP
        Ethernet Interface: IPv4 DHCP, IPv6: fd00:c6a1:dea5:1::2

        A DESCRIPTION OF THE PROBLEM :
        When I try to connect to IPv6 host using literal address it throws a NoRouteToHostException but using ping6 its works.

        In OS X Java always set a scope id in IPv6 addresses, but sometimes set a scope id for a invalid interface (without appropriated IPv6 address).

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        Enable two network interfaces (Wifi and Ethernet) but only set IPv6 address to one.

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        Correct connection to the host (no errors).
        ACTUAL -
        Receive a NoRouteToHostException.

        ERROR MESSAGES/STACK TRACES THAT OCCUR :
        java.net.NoRouteToHostException: No route to host (Host unreachable)
        at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:400)
        at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:243)
        at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:225)
        at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:402)
        at java.base/java.net.Socket.connect(Socket.java:591)
        at java.base/java.net.Socket.connect(Socket.java:540)
        at com.chaldeas.server/com.chaldeas.server.Main.main(Main.java:11)

        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        package com.chaldeas.server;

        import java.io.IOException;
        import java.net.InetSocketAddress;
        import java.net.Socket;

        public class Main {
            public static void main(String [] args) {
                try {
                    Socket socket = new Socket();
                    socket.connect(new InetSocketAddress("[fd00:c6a1:dea5:1::3]", 80));

                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        ---------- END SOURCE ----------

        CUSTOMER SUBMITTED WORKAROUND :
        I found than in OS X, Java in socketConnect native method in PlainSocketImpl class always set a default scope id to the first available interface; in this case is the Wireless interface but it hasn't a valid IPv6 address, if I put a IPv6 address in the interface, the code works, but the interface must be in the same logical network.

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                • Assignee:
                  clanger Christoph Langer
                  Reporter:
                  webbuggrp Webbug Group
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                  • Created:
                    Updated:
                    Resolved: