Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/6968#discussion_r33620460
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -1897,6 +1897,16 @@ class SparkContext(config: SparkConf) extends
Logging with ExecutorAllocationCli
* be a HDFS path if running on a cluster.
*/
def setCheckpointDir(directory: String) {
+
+ // If we are running on a cluster, log a warning if the directory is
local.
+ // Otherwise, the driver may attempt to reconstruct the checkpointed
RDD from
+ // its own local file system, which is incorrect because the
checkpoint files
+ // are actually on the executor machines.
+ if (!isLocal && Utils.nonLocalPaths(directory).isEmpty) {
+ logWarning("Checkpoint directory must be non-local " +
--- End diff --
awesome!
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