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https://issues.apache.org/jira/browse/SPARK-3465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14127920#comment-14127920
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Apache Spark commented on SPARK-3465:
-------------------------------------

User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/2338

> Task metrics are not aggregated correctly in local mode
> -------------------------------------------------------
>
>                 Key: SPARK-3465
>                 URL: https://issues.apache.org/jira/browse/SPARK-3465
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 1.1.0
>            Reporter: Davies Liu
>            Assignee: Davies Liu
>            Priority: Blocker
>
> In local mode, after onExecutorMetricsUpdate(), t.taskMetrics will be the 
> same object with that in TaskContext (because there is no serialization for 
> MetricsUpdate in local mode), then all the upcoming changes in metrics will 
> be lost, because updateAggregateMetrics() only counts the difference in these 
> two. 
> This bug was introduced in https://issues.apache.org/jira/browse/SPARK-2099, 
> cc [~sandyr]]



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