How can I disable IPv6 stack use for IPv4 IPs on JRE?

java jvm ipv6 jvm-arguments
Ebrahim Byagowi picture Ebrahim Byagowi · Aug 7, 2012 · Viewed 91.6k times · Source

As you can see on below screenshots, eclipse and Android SDK Manager (and other Java programs) are trying to connect to a IPv4 Internet IP via IPv6 TCP/IP stack while Proxifier (a proxy manager program, nevermind) can not support that.

Eclipse failure in connecting to the InternetAndroid SDK Manager failure in connecting to the Internet

How I can disable IPv6 in Java?

Answer

Ebrahim Byagowi picture Ebrahim Byagowi · Aug 7, 2012

I wanted to use this for some program I hadn't control for running that Java app so ended with this _JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true environment variable. (read about _JAVA_OPTIONS here)

If you are using Windows, just run this command on Windows cmd:
setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true

Thanks to Jason Nichols for reminding this JVM argument :)

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