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https://issues.apache.org/jira/browse/SPARK-12135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Rosen resolved SPARK-12135.
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Resolution: Won't Fix
It's going to be tricky to assess whether JSON4S actually uses the
scala-compiler and scalap classes. Rather than reasoning about that in Spark
and risking build brittleness, I'd much prefer to contact the JSON4S authors
and see if we can get them to remove the dependency, then depend on a newer
version.
> Remove scala-compiler and scalap deps from Spark runtime
> --------------------------------------------------------
>
> Key: SPARK-12135
> URL: https://issues.apache.org/jira/browse/SPARK-12135
> Project: Spark
> Issue Type: Improvement
> Components: Build, SQL
> Affects Versions: 1.6.0
> Reporter: Xiangrui Meng
> Assignee: Josh Rosen
>
> scala-compiler and scalap are pulled in by json4s 3.2.x, which doesn't really
> use them. scala-compiler is also used by SQL in some obsoleted code. We can
> remove them from Spark deps and save about 16MB in the assembly.
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