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https://issues.apache.org/jira/browse/HADOOP-11630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14335450#comment-14335450
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Elliott Clark commented on HADOOP-11630:
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Yeah I'd like to get that functionality into branch-2 and I'd also like to
clean up trunk so that only setting HADOOP_ALLOW_IPV6 is all that's needed.
> 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
>
>
> 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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