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https://issues.apache.org/jira/browse/SPARK-24648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16522251#comment-16522251
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Apache Spark commented on SPARK-24648:
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User 'dbkerkela' has created a pull request for this issue:
https://github.com/apache/spark/pull/21634
> SQLMetrics counters are not thread safe
> ---------------------------------------
>
> Key: SPARK-24648
> URL: https://issues.apache.org/jira/browse/SPARK-24648
> Project: Spark
> Issue Type: Bug
> Components: Project Infra
> Affects Versions: 2.3.1
> Reporter: Stacy Kerkela
> Priority: Minor
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> The += operator is not atomic, so for broadcast hash joins there have been
> discrepancies observed.
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