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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6056) Use java.net.preferIPv4Stack to force IPv4
Date Mon, 13 Dec 2010 04:28:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12970702#action_12970702

dhruba borthakur commented on HADOOP-6056:

We at FB have been using -Djava.net.preferIPv4Stack=true since the beginning of time :-)

while on this topic, we also use -XX:+UseMembar to avoid other JVM bugs.

> Use java.net.preferIPv4Stack to force IPv4
> ------------------------------------------
>                 Key: HADOOP-6056
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6056
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: scripts
>    Affects Versions: 0.21.0, 0.22.0
>            Reporter: Steve Loughran
>            Assignee: Michele Catasta
>             Fix For: 0.22.0
>         Attachments: HADOOP-6056.patch, hadoop-6056.txt
> This was mentioned on HADOOP-3427, there is a property,  java.net.preferIPv4Stack, which
you set to true for the java net process to switch to IPv4 everywhere. 
> As Hadoop doesn't work on IPv6, this should be set to true in the startup scripts. Hopefully
this will ensure that Jetty will also pick it up.

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