tag:dreamwidth.org,2009-09-23:447974 pvaneynd pvaneynd 2009-12-09T08:30:47Z tag:dreamwidth.org,2009-09-23:447974:132852 2009-12-09T08:30:47Z 2009-12-09T08:30:47Z frustrated public 1 Yesterday webex started failing for me. I did not change anything related to java recently so I was a little perplexed.<br /><br />Checking it turns out that even the standard <a href="http://java.com/en/download/help/testvm.xml">test your java</a> page failed. strace revealed the nice error:<br /><br /><tt><pre>$ grep ffff /tmp/TRA 6938 connect(22, {sa_family=AF_INET6, sin6_port=htons(80), inet_pton(AF_INET6, "::ffff:72.5.124.95", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28 &lt;unfinished ...&gt; 6938 connect(22, {sa_family=AF_INET6, sin6_port=htons(80), inet_pton(AF_INET6, "::ffff:72.5.124.95", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 ENETUNREACH (Network is unreachable)</pre></tt><br /><br />Notice that I don't have IPv6 connectivity!<br /><br />Googling it turns out that you can disable IPv6 in java by modifying to <tt>~/.java/deployment/deployment.properties</tt> the line:<br /><br /><tt>deployment.javaws.jre.0.args=-Djava.net.preferIPv4Stack\=true</tt><br /><br />and all is now well. Until I need to access an IPv6 device with java of course :-(.<br /><br /><img src="https://www.dreamwidth.org/tools/commentcount?user=pvaneynd&ditemid=132852" width="30" height="12" alt="comment count unavailable" style="vertical-align: middle;"/> comments