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https://issues.apache.org/jira/browse/SPARK-23811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16418431#comment-16418431
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Apache Spark commented on SPARK-23811:
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User 'xuanyuanking' has created a pull request for this issue:
https://github.com/apache/spark/pull/20930
> Same tasks' FetchFailed event comes before Success will cause child stage
> never succeed
> ---------------------------------------------------------------------------------------
>
> Key: SPARK-23811
> URL: https://issues.apache.org/jira/browse/SPARK-23811
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.2.0, 2.3.0
> Reporter: Li Yuanjian
> Priority: Major
> Attachments: 1.png, 2.png
>
>
> This is a bug caused by abnormal scenario describe below:
> # ShuffleMapTask 1.0 running, this task will fetch data from ExecutorA
> # ExecutorA Lost, trigger `mapOutputTracker.removeOutputsOnExecutor(execId)`
> , shuffleStatus changed.
> # Speculative ShuffleMapTask 1.1 start, got a FetchFailed immediately.
> # ShuffleMapTask 1 is the last task of its stage, so this stage will never
> succeed because of there's no missing task DagScheduler can get.
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