Joe McDonnell 1913ab46ed IMPALA-14501: Migrate most scripts from impala-python to impala-python3 ...

To remove the dependency on Python 2, existing scripts need to use
python3 rather than python. These commands find those
locations (for impala-python and regular python):
git grep impala-python | grep -v impala-python3 | grep -v impala-python-common | grep -v init-impala-python
git grep bin/python | grep -v python3

This removes or switches most of these locations by various means:
1. If a python file has a #!/bin/env impala-python (or python) but
   doesn't have a main function, it removes the hash-bang and makes
   sure that the file is not executable.
2. Most scripts can simply switch from impala-python to impala-python3
   (or python to python3) with minimal changes.
3. The cm-api pypi package (which doesn't support Python 3) has been
   replaced by the cm-client pypi package and interfaces have changed.
   Rather than migrating the code (which hasn't been used in years), this
   deletes the old code and stops installing cm-api into the virtualenv.
   The code can be restored and revamped if there is any interest in
   interacting with CM clusters.
4. This switches tests/comparison over to impala-python3, but this code has
   bit-rotted. Some pieces can be run manually, but it can't be fully
   verified with Python 3. It shouldn't hold back the migration on its own.
5. This also replaces locations of impala-python in comments / documentation /
   READMEs.
6. kazoo (used for interacting with HBase) needed to be upgraded to a
   version that supports Python 3. The newest version of kazoo requires
   upgrades of other component versions, so this uses kazoo 2.8.0 to avoid
   needing other upgrades.

The two remaining uses of impala-python are:
 - bin/cmake_aux/create_virtualenv.sh
 - bin/impala-env-versioned-python
These will be removed separately when we drop Python 2 support
completely. In particular, these are useful for testing impala-shell
with Python 2 until we stop supporting Python 2 for impala-shell.

The docker-based tests still use /usr/bin/python, but this can
be switched over independently (and doesn't impact impala-python)

Testing:
 - Ran core job
 - Ran build + dataload on Centos 7, Redhat 8
 - Manual testing of individual scripts (except some bitrotted areas like the
   random query generator)

Change-Id: If209b761290bc7e7c716c312ea757da3e3bca6dc
Reviewed-on: http://gerrit.cloudera.org:8080/23468
Reviewed-by: Michael Smith <michael.smith@cloudera.com>
Tested-by: Michael Smith <michael.smith@cloudera.com>

2025-10-22 16:30:17 +00:00

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