Github user mwws commented on a diff in the pull request:
https://github.com/apache/spark/pull/11249#discussion_r53409427
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala ---
@@ -41,6 +41,13 @@ class Checkpoint(ssc: StreamingContext, val
checkpointTime: Time)
val checkpointDuration = ssc.checkpointDuration
val pendingTimes = ssc.scheduler.getPendingTimes().toArray
val sparkConfPairs = ssc.conf.getAll
+ @transient val recoverableAccuNameToId = ssc.recoverableAccuNameToId
+
+ // initialize from ssc.context after SPARK-13051
+ val trackedAccs: Array[AccumulableCheckpoint[_, _]] =
Accumulators.originals.filter(ele =>
--- End diff --
No, `readObject` method of Accumulable is overrided, and some "hacky" code
is added: the value of Accumulable will explicitly be set to 0 when
deserializing. That's why we need this class. I also put the reason on comment.
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