[GitHub] [spark] Ngone51 commented on a change in pull request #31876: [WIP][SPARK-XXXX][API][CORE] Abstract Location in MapStatus to enable support for custom storage

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Ngone51 commented on a change in pull request #31876:
URL: https://github.com/apache/spark/pull/31876#discussion_r596521807



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File path: core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
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@@ -28,16 +28,23 @@ import org.apache.spark.internal.config
 import org.apache.spark.storage.BlockManagerId
 import org.apache.spark.util.Utils
 
+trait Location extends Externalizable {

Review comment:
       `Externalizable` would require the implementers to provide a zero-parameter constructor. Do you think it's acceptable or have any better idea? @hiboyang @attilapiros 




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