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https://issues.apache.org/jira/browse/SPARK-3694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14196411#comment-14196411
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Apache Spark commented on SPARK-3694:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/3091
> Allow printing object graph of tasks/RDD's with a debug flag
> ------------------------------------------------------------
>
> Key: SPARK-3694
> URL: https://issues.apache.org/jira/browse/SPARK-3694
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Patrick Wendell
> Assignee: Ilya Ganelin
> Labels: starter
>
> This would be useful for debugging extra references inside of RDD's
> Here is an example for inspiration:
> http://ehcache.org/xref/net/sf/ehcache/pool/sizeof/ObjectGraphWalker.html
> We'd want to print this trace for both the RDD serialization inside of the
> DAGScheduler and the task serialization in the TaskSetManager.
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