Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/1056#discussion_r15682364
--- Diff: core/src/main/scala/org/apache/spark/ui/jobs/UIData.scala ---
@@ -56,7 +56,7 @@ private[jobs] object UIData {
}
case class TaskUIData(
- taskInfo: TaskInfo,
- taskMetrics: Option[TaskMetrics] = None,
- errorMessage: Option[String] = None)
+ var taskInfo: TaskInfo,
+ var taskMetrics: Option[TaskMetrics] = None,
+ var errorMessage: Option[String] = None)
--- End diff --
In general we strongly prefer immutable data structures because it's much
easier to reason about their state. On this one I'd actually propose keeping it
immutable and we can see if we need to adjust that in the future. I'd actually
recommend decreasing the heartbeat interval to something like 10 seconds (or
maybe less frequent) anyways. To avoid this and other problems.
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