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https://issues.apache.org/jira/browse/SPARK-29329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16943839#comment-16943839
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Thomas Graves commented on SPARK-29329:
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filed issue with scala-maven-plugin, we will see what they say:
https://github.com/davidB/scala-maven-plugin/issues/364
> maven incremental builds not working
> ------------------------------------
>
> Key: SPARK-29329
> URL: https://issues.apache.org/jira/browse/SPARK-29329
> Project: Spark
> Issue Type: Bug
> Components: Build
> Affects Versions: 3.0.0
> Reporter: Thomas Graves
> Priority: Major
>
> It looks like since we Upgraded scala-maven-plugin to 4.2.0
> https://issues.apache.org/jira/browse/SPARK-28759 spark incremental builds
> stop working. Everytime you build its building all files, which takes
> forever.
> It would be nice to fix this.
>
> To reproduce, just build spark once ( I happened to be using the command
> below):
> build/mvn -Phadoop-3.2 -Phive-thriftserver -Phive -Pyarn -Pkinesis-asl
> -Pkubernetes -Pmesos -Phadoop-cloud -Pspark-ganglia-lgpl package -DskipTests
> Then build it again and you will see that it compiles all the files and takes
> 15-30 minutes. With incremental it skips all unnecessary files and takes
> closer to 5 minutes.
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