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https://issues.apache.org/jira/browse/SPARK-8526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16947783#comment-16947783
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Rodney Aaron Stainback commented on SPARK-8526:
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Same question
> Provide a way to define custom metrics and custom metric sink in Spark
> ----------------------------------------------------------------------
>
> Key: SPARK-8526
> URL: https://issues.apache.org/jira/browse/SPARK-8526
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.4.0
> Reporter: Dmitry Goldenberg
> Priority: Major
> Labels: bulk-closed
>
> There is a number of user questions posted into the Spark mailing list
> regarding how to instrument custom metrics within Spark applications:
> * how to define custom metrics
> * how to define a custom metrics sink such as a custom metrics servlet
> * how to call back into the consumers from the sink to report on some actions
> potentially taken by the metrics sink
> Some of this may be a documentation issue. Currently the Metrics section
> under https://spark.apache.org/docs/latest/monitoring.html is rather sparse.
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