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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:15:11 UTC
[jira] [Resolved] (SPARK-19215) Add necessary check for
`RDD.checkpoint` to avoid potential mistakes
[ https://issues.apache.org/jira/browse/SPARK-19215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon resolved SPARK-19215.
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Resolution: Incomplete
> 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
> Priority: Major
> Labels: bulk-closed
> 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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