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https://issues.apache.org/jira/browse/SPARK-5745?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-5745.
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Resolution: Won't Fix
> Allow to use custom TaskMetrics implementation
> ----------------------------------------------
>
> Key: SPARK-5745
> URL: https://issues.apache.org/jira/browse/SPARK-5745
> Project: Spark
> Issue Type: Wish
> Components: Spark Core
> Reporter: Jacek Lewandowski
>
> There can be various RDDs implemented and the {{TaskMetrics}} provides a
> great API for collecting metrics and aggregating them. However some RDDs may
> want to register some custom metrics and the current implementation doesn't
> allow for this (for example the number of read rows or whatever).
> I suppose that this can be changed without modifying the whole interface -
> there could used some factory to create the initial {{TaskMetrics}} object.
> The default factory could be overridden by user.
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