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Posted to jira@arrow.apache.org by "Vedant Roy (Jira)" <ji...@apache.org> on 2022/10/07 02:52:00 UTC

[jira] [Created] (ARROW-17957) NativeFile.download does not work on TemporaryFiles

Vedant Roy created ARROW-17957:
----------------------------------

             Summary: NativeFile.download does not work on TemporaryFiles
                 Key: ARROW-17957
                 URL: https://issues.apache.org/jira/browse/ARROW-17957
             Project: Apache Arrow
          Issue Type: Bug
         Environment: Ubuntu
            Reporter: Vedant Roy


The following code doesn't work:
{code:java}
       with tempfile.TemporaryFile() as temp_file:
                f.download(temp_file) {code}
   where `f` is a `pyarrow.NativeFile`.

I get the error:

```

(_execute_read_task pid=126666)     f.download(temp_file)
(_execute_read_task pid=126666)   File "pyarrow/io.pxi", line 576, in pyarrow.lib.NativeFile.download
(_execute_read_task pid=126666)   File "pyarrow/io.pxi", line 291, in pyarrow.lib.NativeFile.seek
(_execute_read_task pid=126666)   File "pyarrow/io.pxi", line 190, in pyarrow.lib.NativeFile.get_random_access_file
(_execute_read_task pid=126666)   File "pyarrow/io.pxi", line 219, in pyarrow.lib.NativeFile._assert_seekable
(_execute_read_task pid=126666) OSError: only valid on seekable files

```

 

 



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