Bug#560044: net.ipv6.bindv6only=1 breaks java networking

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Heikki Henriksen

Dec 8, 2009, 10:20:01 AM12/8/09
Package: sun-java6-jdk
Version: 6-17-1
Severity: important

Netbase has recently introduced the sysctl-setting
net.ipv6.bindv6only=1 in /etc/sysctl.d/bindv6only.conf and this setting
will probably be the default in squeeze.

This setting breaks networking in java, and any traffic will always
result in a "java.net.SocketException: Network is unreachable".

It should probably be an rc-bug, but setting as important for now, since
users can easily rectify the issue.

Quick fix for users hit by this:

sudo sed -i 's/net.ipv6.bindv6only\ =\ 1/net.ipv6.bindv6only\ =\ 0/' \
/etc/sysctl.d/bindv6only.conf && sudo invoke-rc.d procps restart


-- System Information:
Debian Release: squeeze/sid
APT prefers karmic
APT policy: (500, 'karmic'), (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.31-1-686-bigmem (SMP w/2 CPU cores)
Locale: LANG=nb_NO.UTF-8, LC_CTYPE=nb_NO.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages sun-java6-jdk depends on:
ii debconf [debconf-2.0] 1.5.28 Debian configuration management sy
ii libc6 2.10.2-2 GNU C Library: Shared libraries
ii libx11-6 2:1.3.2-1 X11 client-side library
ii sun-java6-bin 6-17-1 Sun Java(TM) Runtime Environment (

sun-java6-jdk recommends no packages.

Versions of packages sun-java6-jdk suggests:
pn openjdk-6-doc <none> (no description available)
pn sun-java6-demo <none> (no description available)
pn sun-java6-source <none> (no description available)

-- debconf information excluded

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