RDD Graph (json-relay part) #8
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This PR adds functionality to store RDD graph as JSON.
Uses dot files, incoming/outgoing edges, cached RDDs similar to Spark
UIUtils.Adds following events:
SparkListenerGraphSubmit- graph for stage is submittedSparkListenerGraphUpdate- graph for stage is updated (submitted = true)SparkListenerGraphCheck- child for stage is updated (childSubmitted = true)Combinations of these types allow us to mark skipped stages.
Should be merged with similar PR in
slimandspree.