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https://issues.apache.org/jira/browse/SPARK-695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14081669#comment-14081669
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Aaron Staple commented on SPARK-695:
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Progress has been made on a PR here:
https://github.com/apache/spark/pull/1362
> Exponential recursion in getPreferredLocations
> ----------------------------------------------
>
> Key: SPARK-695
> URL: https://issues.apache.org/jira/browse/SPARK-695
> Project: Spark
> Issue Type: Bug
> Reporter: Matei Zaharia
>
> This was reported to happen in DAGScheduler for graphs with many paths from
> the root up, though I haven't yet found a good test case for it.
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