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