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https://issues.apache.org/jira/browse/HADOOP-11072?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng resolved HADOOP-11072.
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Resolution: Duplicate
[Jira cleanup 2026-10-27] The ArrayIndexOutOfBoundsException path described
here no longer exists on trunk. HADOOP-19960 builds the ip6.arpa name for IPv6
addresses in {{DNS.getReverseDnsName}}, and HADOOP-20020 makes
{{DNS.reverseDns}} throw {{NameNotFoundException("No PTR record for ...")}}
when the answer has no PTR record. Closing as a duplicate of HADOOP-19960.
If you think this is closed by mistake. Pls feel free to reopen. Thanks.
> better Logging in DNS.java
> ---------------------------
>
> Key: HADOOP-11072
> URL: https://issues.apache.org/jira/browse/HADOOP-11072
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: net
> Affects Versions: 2.3.0, 2.4.0
> Reporter: jay vyas
> Priority: Minor
> Labels: logging
>
> The DNS.java class should be more informative, and possibly fail early when
> reverse DNS is broken. Right now it is vulnerable to a cryptic ArrayIndex
> exception.
> {noformat}
> parts = hostIp.getHostAddress(....)
> String reverseIp = parts[3] + parts[2] ...
> {noformat}
> During this patch I think we can also improve a couple other minor logging
> statements in the net package.
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