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https://issues.apache.org/jira/browse/HADOOP-6056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12795106#action_12795106
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Steve Loughran commented on HADOOP-6056:
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With the proposed HADOOP-6474 diagnostics feature, we could automate the test
for this; look for the JVM property in the output of the diagnostics .
> 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: Todd Lipcon
> Fix For: 0.21.0, 0.22.0
>
> Attachments: 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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