Github user caneGuy commented on a diff in the pull request: https://github.com/apache/spark/pull/19132#discussion_r138523362 --- Diff: core/src/main/scala/org/apache/spark/status/api/v1/AllStagesResource.scala --- @@ -142,7 +142,7 @@ private[v1] object AllStagesResource { index = uiData.taskInfo.index, attempt = uiData.taskInfo.attemptNumber, launchTime = new Date(uiData.taskInfo.launchTime), - duration = uiData.taskDuration, + duration = uiData.taskDuration(), --- End diff -- You are right, @jerryshao .IIUC, the `ui` in `AllStagesResource.scala` is passed from `ApiRootResource` which also create `sparkUI` by `FSHistoryProvider`.So we can also get `lastUpdateTime` from this `ui` in `AllStagesResource` and pass to the `taskDuration` interface.I think it is another problem for REST?Should we fix here?
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