Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/9428#discussion_r44320738
--- Diff:
core/src/main/scala/org/apache/spark/rdd/ReliableRDDCheckpointData.scala ---
@@ -63,11 +98,20 @@ private[spark] class ReliableRDDCheckpointData[T:
ClassTag](@transient private v
throw new SparkException(s"Failed to create checkpoint path $cpDir")
}
- // Save to file, and reload it as an RDD
- val broadcastedConf = rdd.context.broadcast(
- new SerializableConfiguration(rdd.context.hadoopConfiguration))
- // TODO: This is expensive because it computes the RDD again
unnecessarily (SPARK-8582)
- rdd.context.runJob(rdd,
ReliableCheckpointRDD.writeCheckpointFile[T](cpDir, broadcastedConf) _)
+ val checkpointedPartitionFiles =
fs.listStatus(path).map(_.getPath.getName).toSet
+ // Not all actions compute all partitions of the RDD (e.g. take). For
correctness, we
+ // must checkpoint any missing partitions. TODO: avoid running another
job here (SPARK-8582).
--- End diff --
don't need the TODO here
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