Github user pwendell commented on the pull request: https://github.com/apache/spark/pull/2673#issuecomment-59468461 Hm - is there any workaround to that? We don't actually need to publish the parent pom anyways if we are using effective poms. Could we just install the other modules only and not the parent? The current approach also adds Guava logic to the parent pom which doesn't make much sense. I think ideally we'd just have a very simple "dummy" relocation (e.g. without any exclusions) in the parent and the existing shading stuff around guava would be in `core/pom.xml`. Does the NPE go away if you do that?
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