[jira] [Updated] (SPARK-17540) SparkR array serde cannot work correctly when array length == 0

["Weichen Xu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-17540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Weichen Xu updated SPARK-17540:
-------------------------------
    Description: 
SparkR cannot handle array serde when array length == 0
when length = 0
R side set the element type as class("somestring")
so that scala side code receive it as a string array,
but the array we need to transfer may be other types,
it will cause problem.

{code:title=Bar.java|borderStyle=solid}
// Some comments here
public String getFoo()
{
    return foo;
}
{code}

  was:
SparkR cannot handle array serde when array length == 0
when length = 0
R side set the element type as class("somestring")
so that scala side code receive it as a string array,
but the array we need to transfer may be other types,
it will cause problem.


> SparkR array serde cannot work correctly when array length == 0
> ---------------------------------------------------------------
>
>                 Key: SPARK-17540
>                 URL: https://issues.apache.org/jira/browse/SPARK-17540
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core, SparkR
>    Affects Versions: 2.1.0
>            Reporter: Weichen Xu
>
> SparkR cannot handle array serde when array length == 0
> when length = 0
> R side set the element type as class("somestring")
> so that scala side code receive it as a string array,
> but the array we need to transfer may be other types,
> it will cause problem.
> {code:title=Bar.java|borderStyle=solid}
> // Some comments here
> public String getFoo()
> {
>     return foo;
> }
> {code}



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