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https://issues.apache.org/jira/browse/HADOOP-15190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341364#comment-16341364
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Chris Douglas commented on HADOOP-15190:
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Thanks for the patch, Duo. Are there advantages to writing this as a new
submodule, as in [^HADOOP-15190.01.patch]? HADOOP-14663 seems to achieve the
same objective, and we wouldn't need to update {{hadoop-coverage}} when we add
new submodules.
While the two tools measure coverage
[differently|http://openclover.org/doc/manual/4.2.0/general--comparison-of-code-coverage-tools.html],
either would be suitable. OpenClover uses ALv2, JaCoCo uses the
[EPL|https://www.apache.org/legal/resolved.html#category-b]; no significant
difference in our use. Is there a strong argument in favor of one over the
other?
> Use Jacoco to generate Unit Test coverage reports
> -------------------------------------------------
>
> Key: HADOOP-15190
> URL: https://issues.apache.org/jira/browse/HADOOP-15190
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build
> Reporter: Duo Xu
> Assignee: Duo Xu
> Priority: Minor
> Attachments: HADOOP-15190.01.patch, jacoco_report_2018_01_25.JPG
>
>
> Currently Hadoop is using maven-clover2-plugin for code coverage, which is
> outdated. And Atlassian open-sourced clover last year so license cannot be
> purchased although we can switch to use the license-free version called
> "openclover".
> This Jira is to replace clover with Jacoco, which is actively maintained by
> the community.
>
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