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https://issues.apache.org/jira/browse/HADOOP-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12607274#action_12607274
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Steve Loughran commented on HADOOP-3619:
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It would be relatively simple to fix this and add rDNS support for ipv6
addresses. Question is: what else would break?
1. Should the rDNS logic just pretend that IPv6 doesnt exist?
2. Should the code that enumerates interfaces skip IPv6 addresses?
> DNS.getHosts triggers an ArrayIndexOutOfBoundsException in reverseDNS if one
> of the interfaces is IPv6
> ------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-3619
> URL: https://issues.apache.org/jira/browse/HADOOP-3619
> Project: Hadoop Core
> Issue Type: Bug
> Reporter: Steve Loughran
>
> reverseDNS tries to split a host address string by ".", and so fails if ":"
> is the separator, as it is in IPv6. When it tries to access the parts of the
> address, a stack trace is seen.
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