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https://issues.apache.org/jira/browse/HADOOP-20030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siyao Meng updated HADOOP-20030:
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Status: Patch Available (was: Open)
> Add an opt-in Maven profile and CI job that run tests with IPv6 enabled
> -----------------------------------------------------------------------
>
> Key: HADOOP-20030
> URL: https://issues.apache.org/jira/browse/HADOOP-20030
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
> Labels: ipv6
>
> The default surefire configuration sets {{java.net.preferIPv4Stack=true}} for
> every test JVM:
> {code:xml}
> <java.net.preferIPv4Stack>true</java.net.preferIPv4Stack>
> {code}
> [hadoop-project/pom.xml:2624|https://github.com/apache/hadoop/blob/1097744bc490b65cad5ab2fbeafff35687971357/hadoop-project/pom.xml#L2624]
> With that setting the JVM uses IPv4-only sockets, so tests cannot exercise
> IPv6 code paths even on a host with IPv6 loopback. There is also no CI job
> for IPv6. The IPv6 fixes under HADOOP-11890 therefore have unit tests for
> parsing and formatting, but nothing runs servers or clients over IPv6 in CI.
> *Proposal:*
> * Add an opt-in {{ipv6-test}} Maven profile that sets
> {{java.net.preferIPv4Stack=false}} and {{java.net.preferIPv6Addresses=true}}
> for surefire. The default build is unchanged.
> * Add a GitHub Actions workflow that runs a selected set of IPv6 tests under
> that profile. IPv6 loopback ({{::1}}) is available on hosted runners without
> outbound IPv6.
> * Optionally, a manually triggered job that builds the distribution and runs
> a small IPv6-only docker-compose cluster smoke test.
> Changing the default to dual-stack for all tests is a separate decision and
> is not proposed here.
> POC:
> https://github.com/smengcl/hadoop/commit/3aa86b3ccdebf594d7661786c22ce54e2c6baad1
> (profile) and
> https://github.com/smengcl/hadoop/commit/f0ed93b0eac18e19e391e2a6812b0f343ec0e20d
> (workflow)
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