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https://issues.apache.org/jira/browse/SPARK-1622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13982163#comment-13982163
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Patrick Wendell commented on SPARK-1622:
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I think it would be good to have a general mechanism for RDD implementations to
add contextual information for each task that ends up `TaskInfo`. This could
include values pinned to a specific task but also counters which can be
aggregated across all the tasks in a stage.
> Expose input split(s) accessed by a task in UI or logs
> ------------------------------------------------------
>
> Key: SPARK-1622
> URL: https://issues.apache.org/jira/browse/SPARK-1622
> Project: Spark
> Issue Type: Improvement
> Reporter: Matei Zaharia
>
> Right now it's hard to debug which input files or blocks therein have invalid
> data. The InputSplit for a HadoopRDD is not even exposed programmatically in
> Scala/Java (it's private[spark]).
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