Add a public method getCachedRdds to SparkContext
Add toMap method to TimeStampedHashMap and use it
Rename method per rxin feedback
Move getPersistentRDDs testing to a new Suite
Made RegressionModel serializable and added unit tests to make sure predict methods would work.
Use a different validation dataset for Logistic Regression prediction testing.
Merge pull request #720 from ooyala/2013-07/persistent-rdds-api

Add a public method getCachedRdds to SparkContext
Tracks task start events and shows number of active tasks on Executor UI
Merge pull request #723 from rxin/mllib

Made RegressionModel serializable and added unit tests to make sure predict methods would work.
Adds/removes active tasks only once
SPARK-829: scheduler shouldn't hang if a task contains unserializable objects in its closure.
Scheduler code style cleanup.
SPARK-829: scheduler shouldn't hang if a task contains unserializable objects in its closure.
Replaces Seq with HashSet, removes redundant import
Modifies instead of copies HashSets, fixes comment style
Merge pull request #725 from karenfeng/task-start

Creates task start events
Small bug fix
Moved non-serializable closure catching exception from submitStage to submitMissingTasks
Added comments on task closure serialization.
Moved non-serializable closure catching exception from submitStage to submitMissingTasks