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https://issues.apache.org/jira/browse/SPARK-24021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16443496#comment-16443496
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Apache Spark commented on SPARK-24021:
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User 'Ngone51' has created a pull request for this issue:
https://github.com/apache/spark/pull/21104
> Fix bug in BlacklistTracker's updateBlacklistForFetchFailure
> ------------------------------------------------------------
>
> Key: SPARK-24021
> URL: https://issues.apache.org/jira/browse/SPARK-24021
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.0
> Reporter: wuyi
> Priority: Major
> Labels: easyfix
>
> There‘s a miswrite in BlacklistTracker's updateBlacklistForFetchFailure:
> ```
> val blacklistedExecsOnNode =
> nodeToBlacklistedExecs.getOrElseUpdate(exec, HashSet[String]())
> blacklistedExecsOnNode += exec
> ```
> where first **exec** should be **host**.
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