[jira] [Updated] (SPARK-12061) Persist for Map/filter with Lambda Functions don't always read from Cache

["Takeshi Yamamuro (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-12061?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Takeshi Yamamuro updated SPARK-12061:
-------------------------------------
    Affects Version/s: 2.1.0

> Persist for Map/filter with Lambda Functions don't always read from Cache
> -------------------------------------------------------------------------
>
>                 Key: SPARK-12061
>                 URL: https://issues.apache.org/jira/browse/SPARK-12061
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.0, 2.1.0
>            Reporter: Xiao Li
>
> So far, the existing caching mechanisms do not work on dataset operations when using map/filter with lambda functions. For example, 
> {code}
>   test("persist and then map/filter with lambda functions") {
>     val f = (i: Int) => i + 1
>     val ds = Seq(1, 2, 3).toDS()
>     val mapped = ds.map(f)
>     mapped.cache()
>     val mapped2 = ds.map(f)
>     assertCached(mapped2)
>   }
> {code}



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