Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/19383#discussion_r147566828 --- Diff: core/src/main/scala/org/apache/spark/status/api/v1/api.scala --- @@ -129,9 +129,13 @@ class RDDDataDistribution private[spark]( val memoryUsed: Long, val memoryRemaining: Long, val diskUsed: Long, + @JsonDeserialize(contentAs = classOf[JLong]) --- End diff -- what does this mean?
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