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https://issues.apache.org/jira/browse/HADOOP-11630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14335479#comment-14335479
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Elliott Clark commented on HADOOP-11630:
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So one this cleans up the config variable so that it actually does what it
says. And two it allows that work to continue forward while real production
systems move forward. It in no way slows any progress on any other solution.
> Allow hadoop to bind to ipv6 conditionally
> ------------------------------------------
>
> Key: HADOOP-11630
> URL: https://issues.apache.org/jira/browse/HADOOP-11630
> Project: Hadoop Common
> Issue Type: Improvement
> Components: scripts
> Affects Versions: 2.6.0
> Reporter: Elliott Clark
> Assignee: Elliott Clark
> Labels: ipv6
> Attachments: HDFS-7834-branch-2-0.patch, HDFS-7834-trunk-0.patch
>
>
> Currently the bash scripts unconditionally add -Djava.net.preferIPv4Stack=true
> While this was needed a while ago. IPV6 on java works much better now and
> there should be a way to allow it to bind dual stack if needed.
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