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https://issues.apache.org/jira/browse/SPARK-2412?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Wendell resolved SPARK-2412.
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Resolution: Fixed
Fix Version/s: 1.1.0
1.0.2
Issue resolved by pull request 1337
[https://github.com/apache/spark/pull/1337]
> CoalescedRDD throws exception with certain pref locs
> ----------------------------------------------------
>
> Key: SPARK-2412
> URL: https://issues.apache.org/jira/browse/SPARK-2412
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.0.0
> Reporter: Aaron Davidson
> Assignee: Aaron Davidson
> Fix For: 1.0.2, 1.1.0
>
>
> If the first pass of CoalescedRDD does not find the target number of
> locations AND the second pass finds new locations, an exception is thrown, as
> "groupHash.get(nxt_replica).get" is not valid.
> The fix is just to add an ArrayBuffer to groupHash for that replica if it
> didn't already exist.
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