Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/6968#discussion_r33628298
--- Diff: core/src/main/scala/org/apache/spark/rdd/RDDCheckpointData.scala
---
@@ -46,37 +45,35 @@ private[spark] class RDDCheckpointData[T:
ClassTag](@transient rdd: RDD[T])
import CheckpointState._
// The checkpoint state of the associated RDD.
- var cpState = Initialized
+ private var cpState = Initialized
// The file to which the associated RDD has been checkpointed to
- @transient var cpFile: Option[String] = None
+ private var cpFile: Option[String] = None
// The CheckpointRDD created from the checkpoint file, that is, the new
parent the associated RDD.
- var cpRDD: Option[RDD[T]] = None
-
- // Mark the RDD for checkpointing
- def markForCheckpoint() {
- RDDCheckpointData.synchronized {
- if (cpState == Initialized) cpState = MarkedForCheckpoint
- }
- }
+ // This is defined if and only if `cpState` is `Checkpointed`.
+ private var cpRDD: Option[CheckpointRDD[T]] = None
// Is the RDD already checkpointed
- def isCheckpointed: Boolean = {
- RDDCheckpointData.synchronized { cpState == Checkpointed }
+ def isCheckpointed: Boolean = synchronized {
+ cpState == Checkpointed
--- End diff --
Could you add the reasoning in the documentation.
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