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https://issues.apache.org/jira/browse/SPARK-19215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-19215:
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Assignee: Apache Spark
> Add necessary check for `RDD.checkpoint` to avoid potential mistakes
> --------------------------------------------------------------------
>
> Key: SPARK-19215
> URL: https://issues.apache.org/jira/browse/SPARK-19215
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Weichen Xu
> Assignee: Apache Spark
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Currently RDD.checkpoint must be called before any job executed on this RDD,
> otherwise the `doCheckpoint` will never be called. This is a pitfall we
> should check this and throw exception (or at least log warning ? ) for such
> case.
> And, if RDD haven't been persisted, doing checkpoint will cause RDD
> recomputation, because current implementation will run separated job for
> checkpointing. I think such case it should also print some warning message,
> remind user to check whether he forgot persist the RDD.
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