[jira] [Updated] (ARROW-14787) [Python] read an HDFS file by line failed when the open_mode is "rb"

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-14787?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joris Van den Bossche updated ARROW-14787:
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    Summary: [Python] read an HDFS file by line failed when the open_mode is "rb"  (was: read an HDFS file by line failed when the open_mode is "rb")

> [Python] read an HDFS file by line failed when the open_mode is "rb"
> --------------------------------------------------------------------
>
>                 Key: ARROW-14787
>                 URL: https://issues.apache.org/jira/browse/ARROW-14787
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>    Affects Versions: 6.0.0
>         Environment: System: Ubuntu 18.04
> fsspec: 2021.10.1
> pyarrow: 6.0.0
>            Reporter: nero
>            Priority: Major
>
> Hi there,
> I found some problems when I use `{*}fsspec`{*} to read an HDFS file by line when the open_mode is "rb". It works fine when the *open_mode is "r"* or the {*}file is located locally{*}.
> some snippets:
> {code:java}
> import fsspec
> hdfs_file_path = "hdfs://xxxxxx"
> with fsspec.open(hdfs_file_path, "rb") as f: 
>     # raise UnspportedOperation
>     f.readline() {code}
>  
> Error logs:
>  
> /opt/conda/lib/python3.7/site-packages/pyarrow/io.pxi in pyarrow.lib.NativeFile.readline()
> UnsupportedOperation:
> Originally from: https://github.com/fsspec/filesystem_spec/issues/810



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