[jira] [Closed] (ARROW-17373) [R] copying dataset and immediatly writing the copy to a different location fails

["Dewey Dunnington (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-17373?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dewey Dunnington closed ARROW-17373.
------------------------------------
    Resolution: Duplicate

> [R] copying dataset and immediatly writing the copy to a different location fails
> ---------------------------------------------------------------------------------
>
>                 Key: ARROW-17373
>                 URL: https://issues.apache.org/jira/browse/ARROW-17373
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: R
>    Affects Versions: 9.0.0
>         Environment: Ubuntu 22.04
>            Reporter: Egill Axfjord Fridgeirsson
>            Priority: Major
>
> When I copy large feather files, open a dataset from that file and immediately write that dataset to a new location I get the following error:
>  
> ```Error: Invalid: Expected to read 144 metadata bytes but got 0```
>  
> I have made a reproducible example below:
>  
> ``` r
> df <- data.frame(replicate(1,sample(0:1,100e6,rep=TRUE)))
> savePath <- file.path(tempdir(), 'arrowTest')
> if (!dir.exists(savePath)) {
>   dir.create(savePath)
> }
> arrow::write_feather(df, file.path(savePath, 'part-0.feather'))
> copyPath <- file.path(tempdir(),'arrowTest')
> if (!dir.exists(copyPath)) {
>   dir.create(copyPath)
> }
> writePath <- file.path(tempdir(), 'arrowTest')
> if (!dir.exists(writePath)) {
>   dir.create(writePath)
> }
> arrow::copy_files(savePath, copyPath)
> dataset <- arrow::open_dataset(copyPath, format='feather')
> arrow::write_dataset(dataset = dataset, path = writePath, format = 'feather')
> ```



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