[jira] Commented: (HADOOP-6056) Use java.net.preferIPv4Stack to force IPv4

["Steve Loughran (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-6056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12802358#action_12802358 ] 

Steve Loughran commented on HADOOP-6056:
----------------------------------------

Michele, I can see this will be trouble.

# I think you should open a separate (related) bug for this, or the patch should merge in both changes.
# Also, use {{git diff --no-prefix}} for creating patches, its what Hudson needs
# I would prefer the message to point to a wiki page in wiki.apache.org/Hadoop where we can talk about Hadoop on IPv4, instead of straight to the debian bug. This lets us change the text over time, provide something integrated with the rest of Hadoop. 

> 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.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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