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Posted to issues-all@impala.apache.org by "Michael Smith (Jira)" <ji...@apache.org> on 2022/05/31 23:13:00 UTC
[jira] [Commented] (IMPALA-11325) Impala-shell hits UnicodeDecodeError when outputting Unicode via --output_file
[ https://issues.apache.org/jira/browse/IMPALA-11325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17544639#comment-17544639 ]
Michael Smith commented on IMPALA-11325:
----------------------------------------
One thing I'd watch for is whether input from a file or the CLI has a different encoding than responses from the database. Encoding to utf-8 may have worked in some contexts, and Python 2 is notorious for not treating input as utf-8.
> 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
> Priority: Blocker
>
> 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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