[jira] [Created] (IMPALA-11325) Impala-shell hits UnicodeDecodeError when outputting Unicode via --output_file

["Joe McDonnell (Jira)" <ji...@apache.org>]

Joe McDonnell created IMPALA-11325:
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             Summary: Impala-shell hits UnicodeDecodeError when outputting Unicode via --output_file
                 Key: IMPALA-11325
                 URL: https://issues.apache.org/jira/browse/IMPALA-11325
             Project: IMPALA
          Issue Type: Bug
          Components: Clients
    Affects Versions: Impala 4.2.0
            Reporter: Joe McDonnell


When running impala-shell and trying to output Unicode to a fail via --output file, it fails:
{noformat}
ishell -B -q "select '引'" --output_file=joetest3.txt
/home/joe/view2/Impala/shell/option_parser.py:359: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
  if '--live_progress' in sys.argv and '--disable_live_progress' in sys.argv:
/home/joe/view2/Impala/shell/option_parser.py:363: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
  if '--strict_hs2_protocol' in sys.argv:
/home/joe/view2/Impala/shell/option_parser.py:369: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
  if '--verbose' in sys.argv and '--quiet' in sys.argv:
Starting Impala Shell with no authentication using Python 2.7.16
Warning: live_progress only applies to interactive shell sessions, and is being skipped for now.
Opened TCP connection to localhost:21050
Connected to localhost:21050
Server version: impalad version 4.1.0-SNAPSHOT DEBUG (build 4236c307b971881a3b1d85068db5b053a9c34cfa)
Query: select '引'
Query submitted at: 2022-05-31 08:31:50 (Coordinator: http://joemcdonnell:25000)
Query progress can be monitored at: http://joemcdonnell:25000/query_plan?query_id=2347462fe8a18544:bbeedc1800000000
UnicodeDecodeError : 'ascii' codec can't decode byte 0xe5 in position 0: ordinal not in range(128) 
Please check for columns containing binary data to find the possible source of the error.
Could not execute command: select '引'{noformat}
This is specific to file output. This same query works if outputting to the console.

This line seems to be the problem:
{noformat}
        with open(self.filename, 'ab') as out_file:
          # Note that instances of this class do not persist, so it's fine to
          # close the we close the file handle after each write.
          out_file.write(formatted_data.encode('utf-8'))  # file opened in binary mode <--------
          out_file.write(b'\n')
{noformat}
[https://github.com/apache/impala/blob/master/shell/shell_output.py#L115]

It seems to work if we remove the .encode('utf-8').



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