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https://issues.apache.org/jira/browse/HADOOP-12491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14965165#comment-14965165
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Nemanja Matkovic commented on HADOOP-12491:
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Thanks for questions, these are the answers:
2. Yup, my change only alters comment that says "we don't support IPv6", but
keeps IPv4 as default. [~eclark] will tackle how to keep running IPv6
configuration in HADOOP-11630
3. New DNS tests will work in offline mode as I'm testing only parsing on
IPv6 address into nibbles, not actually querying DNS server for it (possible
test miss, but seems to me that querying DNS would introduce more flakiness
that benefit?)
4. I did a test run on dual stack machine where all tests have
"preferIPv4Stack=true" (AFAIK that is the same as IPv4 only machine, it is
going only through IPv4 codepaths) - nothing happens, tests run and pass.
> Hadoop-common - Avoid unsafe split and append on fields that might be IPv6
> literals
> -----------------------------------------------------------------------------------
>
> Key: HADOOP-12491
> URL: https://issues.apache.org/jira/browse/HADOOP-12491
> Project: Hadoop Common
> Issue Type: Sub-task
> Affects Versions: HADOOP-11890
> Reporter: Nemanja Matkovic
> Assignee: Nemanja Matkovic
> Labels: ipv6
> Fix For: HADOOP-11890
>
> Attachments: HADOOP-12491-HADOOP-11890.1.patch,
> HADOOP-12491-HADOOP-11890.2.patch
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> Hadoop-common portion of HADOOP-12122
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