Github user jiangxb1987 commented on a diff in the pull request:
https://github.com/apache/spark/pull/18913#discussion_r132706353
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -1792,6 +1796,9 @@ class SparkContext(config: SparkConf) extends Logging
{
/**
* Adds a JAR dependency for all tasks to be executed on this
`SparkContext` in the future.
+ *
+ * If a jar is added during execution, it will not be available until
the next TaskSet starts.
--- End diff --
Should we document the behavior?
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