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https://issues.apache.org/jira/browse/HADOOP-6056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885174#action_12885174
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Steve Loughran commented on HADOOP-6056:
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I don't start my machines via the shell scripts, so can't say whether or not it
works; i've tweaked how my own JVMs start and added some in-JVM tests for IPV4
looking at the code, my main concern is what happens if there isn't an
/sbin/sysctl on the path, like on cygwin, OS/X or other systems. We probably
need a check round there to look for that function before calling it...
> 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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