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https://issues.apache.org/jira/browse/SPARK-30108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17001619#comment-17001619
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Ankit Raj Boudh commented on SPARK-30108:
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[~hvanhovell], Thank you, during development of this feature i will take care
of this point.
> Add robust accumulator for observable metrics
> ---------------------------------------------
>
> Key: SPARK-30108
> URL: https://issues.apache.org/jira/browse/SPARK-30108
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Herman van Hövell
> Priority: Major
>
> Spark accumulators reflect the work that has been done, and not the data that
> has been processed. There are situations where one tuple can be processed
> multiple times, e.g.: task/stage retries, speculation, determination of
> ranges for global ordered, etc... For observed metrics we need the value of
> the accumulator to be based on the data and not on processing.
> The current aggregating accumulator is already robust to some of these issuesÂ
> (like task failure), but we need to add some additional checks to make sure
> it is fool proof.
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