Github user pwendell commented on the pull request: https://github.com/apache/spark/pull/3658#issuecomment-71544279 Hey so a couple questions about this. This does make things simpler overall in terms of the build. Some higher level questions: 1. This adds 1,500 class files and about 2 MB or a 30% in file size to the Spark core jar. Does this suggest any limits on how many overall dependencies we can shade in Spark longer term (i.e. in addition to guava)? 2. Inlining two of our own sub-projects into the spark-core jar seems a bit strange. Why not just have the shaded guava in the little assembly jar we create for YARN? Is there a reason we _must_ use the guava dependency that is provided on the cluster? If we did take the current approach, does this mean that Spark core as advertised in maven central won't depend on Spark's network modules... would we still publish the network modules then?
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