Andrew Or created SPARK-7644:
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             Summary: Ensure all scoped RDD operations are tested and cleaned
                 Key: SPARK-7644
                 URL: https://issues.apache.org/jira/browse/SPARK-7644
             Project: Spark
          Issue Type: Bug
          Components: Spark Core, SQL, Streaming
    Affects Versions: 1.4.0
            Reporter: Andrew Or
            Assignee: Andrew Or
            Priority: Blocker


If all goes well, this will be a "Won't Fix". Before releasing we should make 
sure all operations wrapped in `RDDOperationScope.withScope` are actually 
tested and enclosed closures are actually cleaned. This is because a big change 
went into `ClosureCleaner` and wrapping methods in closures may change whether 
they are serializable.

TL;DR we should run all the wrapped operations to make sure we don't run into 
java.lang.NotSerializableException.



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