Github user alcaid1801 commented on a diff in the pull request:
https://github.com/apache/spark/pull/4273#discussion_r27113080
--- Diff: graphx/src/main/scala/org/apache/spark/graphx/Pregel.scala ---
@@ -139,6 +141,14 @@ object Pregel extends Logging {
// get to send messages. We must cache messages so it can be
materialized on the next line,
// allowing us to uncache the previous iteration.
messages = g.mapReduceTriplets(sendMsg, mergeMsg, Some((newVerts,
activeDirection))).cache()
+
+ if (checkpoint && i % checkpointFrequency == checkpointFrequency -
1) {
--- End diff --
We should output a log if the checkpoint is not active when the checkpoint
dir is not set
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