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https://issues.apache.org/jira/browse/HADOOP-3619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12607261#action_12607261
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Steve Loughran commented on HADOOP-3619:
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The stack trace
Testcase: testGetDefaultHostFromDefaultInterface took 0.008 sec
Caused an ERROR
3
java.lang.ArrayIndexOutOfBoundsException: 3
at org.apache.hadoop.net.DNS.reverseDns(DNS.java:66)
at org.apache.hadoop.net.DNS.getHosts(DNS.java:153)
at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:254)
at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:272)
at org.apache.hadoop.net.DNS.getDefaultHost(DNS.java:251)
at
org.apache.hadoop.net.TestDNS.testGetDefaultHostFromDefaultInterface(TestDNS.java:153)
This was raised when examining eth0, which is:
eth0 Link encap:Ethernet HWaddr 00:1C:C4:17:CC:46
inet addr:16.25.171.118 Bcast:16.25.171.255 Mask:255.255.252.0
inet6 addr: fe80::21c:c4ff:fe17:cc46/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> 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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