Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/10835#discussion_r51062999
--- Diff: core/src/main/scala/org/apache/spark/Accumulator.scala ---
@@ -75,43 +84,65 @@ private[spark] object Accumulators extends Logging {
* This global map holds the original accumulator objects that are
created on the driver.
* It keeps weak references to these objects so that accumulators can be
garbage-collected
* once the RDDs and user-code that reference them are cleaned up.
+ * TODO: Don't use a global map; these should be tied to a SparkContext
at the very least.
--- End diff --
https://issues.apache.org/jira/browse/SPARK-13051
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