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https://issues.apache.org/jira/browse/SPARK-24748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16603652#comment-16603652
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Apache Spark commented on SPARK-24748:
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User 'zsxwing' has created a pull request for this issue:
https://github.com/apache/spark/pull/22334
> Support for reporting custom metrics via Streaming Query Progress
> -----------------------------------------------------------------
>
> Key: SPARK-24748
> URL: https://issues.apache.org/jira/browse/SPARK-24748
> Project: Spark
> Issue Type: Improvement
> Components: Structured Streaming
> Affects Versions: 2.3.1
> Reporter: Arun Mahadevan
> Assignee: Arun Mahadevan
> Priority: Major
> Fix For: 2.4.0
>
>
> Currently the Structured Streaming sources and sinks does not have a way to
> report custom metrics. Providing an option to report custom metrics and
> making it available via Streaming Query progress can enable sources and sinks
> to report custom progress information (E.g. the lag metrics for Kafka source).
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