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https://issues.apache.org/jira/browse/AMBARI-20813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15978071#comment-15978071
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Yusaku Sako commented on AMBARI-20813:
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The UT failures for trunk is not related to the patches. Ambari Web build/test
was successful.
> Convert ambari-web build process to use yarn package manager to fix
> dependencies and to make the process faster
> ---------------------------------------------------------------------------------------------------------------
>
> Key: AMBARI-20813
> URL: https://issues.apache.org/jira/browse/AMBARI-20813
> Project: Ambari
> Issue Type: Task
> Components: ambari-web
> Affects Versions: 2.5.1
> Reporter: Yusaku Sako
> Assignee: Yusaku Sako
> Priority: Critical
> Fix For: 2.5.1
>
> Attachments: AMBARI-20813.patch, yarn.lock.branch-2.5, yarn.lock.trunk
>
>
> We've seen too many build failures for Ambari even when there are no source
> code changes due to dependent npm packages introducing breaking changes in
> newer versions. This happens because npm installs the latest version of the
> packages allowed by the specified version patterns in package.json. Even if
> we fix the versions in package.json, we are still vulnerable to this issue,
> because the dependent packages specified in package.json can bring in their
> own dependencies and thus bring in new versions of these packages that can
> have breaking changes.
> To get around issue, we will integrate "yarn", an npm package dependency
> manager, to the mvn build process.
> Executing "yarn" will automatically create a "yarn.lock" file so that all the
> packages that are installed, including recursive dependencies, will have the
> exact version on subsequent installs. Note that this "yarn.lock" file needs
> to be checked in to the repository so that installed versions are actually
> fixed. An additional benefit of using "yarn" is that it dramatically speeds
> up npm package installs: https://yarnpkg.com/lang/en/compare/
> There's a similar dependency management tool called "npm-shrinkwrap".
> However, "yarn" seems superior in terms of install speed and also
> reproducibility of installed package versions:
> http://stackoverflow.com/questions/40057469/what-is-the-difference-between-yarn-lock-and-npm-shrinkwrap
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