Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/6672#discussion_r33149671
--- Diff: core/src/main/scala/org/apache/spark/util/JsonProtocol.scala ---
@@ -848,6 +908,60 @@ private[spark] object JsonProtocol {
new ExecutorInfo(executorHost, totalCores, logUrls)
}
+ def blockUpdatedInfoFromJson(json: JValue): BlockUpdatedInfo = {
+ BlockUpdatedInfo(
+ blockManagerIdFromJson(json \ "Block Manager ID"),
+ blockIdFromJson(json \ "Block ID"),
+ storageLevelFromJson(json \ "Storage Level"),
+ (json \ "Memory Size").extract[Long],
+ (json \ "Disk Size").extract[Long],
+ (json \ "ExternalBlockStore Size").extract[Long]
+ )
+ }
+
+ def blockIdFromJson(json: JValue): BlockId = {
+ val rddBlockId = Utils.getFormattedClassName(RDDBlockId)
+ val shuffleBlockId = Utils.getFormattedClassName(ShuffleBlockId)
+ val shuffleDataBlockId =
Utils.getFormattedClassName(ShuffleDataBlockId)
+ val shuffleIndexBlockId =
Utils.getFormattedClassName(ShuffleIndexBlockId)
+ val broadcastBlockId = Utils.getFormattedClassName(BroadcastBlockId)
+ val taskResultBlockId = Utils.getFormattedClassName(TaskResultBlockId)
+ val streamBlockId = Utils.getFormattedClassName(StreamBlockId)
+
+ (json \ "Class Name").extract[String] match {
--- End diff --
> That situation might occur if we're parsing a newer event log using an
older version of the Spark HistoryServer.
Good point. But actually, I think JsonProtocol only supports
backward-compatibility. `JsonProtocol.sparkEventFromJson` does not handle
unknown class names either. Because `ReplayListenerBus` will throw an exception
if parsing a json event log unsuccessfully, it cannotsupport
forward-compatibility.
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