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https://issues.apache.org/jira/browse/HADOOP-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12607262#action_12607262
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Steve Loughran commented on HADOOP-3619:
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If you tweak the method to throw IllegalArgumentException in such instances
java.lang.IllegalArgumentException: Unable to determine IPv4 address of
fe80:0:0:0:21c:c4ff:fe17:cc46%2
at org.apache.hadoop.net.DNS.reverseDns(DNS.java:68)
at org.apache.hadoop.net.DNS.getHosts(DNS.java:158)
at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:259)
at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:277)
at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:256)
at
org.apache.hadoop.net.TestDNS.testGetDefaultHostFromDefaultInterface(TestDNS.java:153)
> 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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