[jira] [Updated] (ARROW-17761) R arrow::read_parquet shows misleading message about url scheme when reading from s3 failed

["Alex Deng (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-17761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alex Deng updated ARROW-17761:
------------------------------
    Priority: Minor  (was: Critical)

> R arrow::read_parquet shows misleading message about url scheme when reading from s3 failed
> -------------------------------------------------------------------------------------------
>
>                 Key: ARROW-17761
>                 URL: https://issues.apache.org/jira/browse/ARROW-17761
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>            Reporter: Alex Deng
>            Priority: Minor
>
> When reading from s3 failed, the error message user get is 
> Error in url(file, open = "rb") : URL scheme unsupported by this metho
>  
> The reason is in arrow:::make_readable_file, the code tries to create a filesystem from path and if this step failed, it tries to run is_url which doesn't supports s3. s3 reading can fail due to many reasons, from auth to s3 path doesn't exist. The request is to make the error message more useful. 
>    if (inherits(file, "SubTreeFileSystem")) \{
>         filesystem <- file$base_fs
>         path <- sub("/$", "", file$base_path)
>         file <- filesystem$OpenInputFile(path)
>     }
>     else if (is.string(file)) \{
>         if (is_url(file)) {
>             file <- tryCatch({
>                 fs_and_path <- FileSystem$from_uri(file)
>                 fs_and_path$fs$OpenInputFile(fs_and_path$path)
>             }, error = function(e) \{
>                 MakeRConnectionInputStream(url(file, open = "rb"))
>             })
>         }



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