RDO Stack Exception: UnboundLocalError: local variable 'logFile' referenced before assignment

Issue:

When you install RDO stack on CentOS, you may encounter following error.

Error:
[root@localhost ~]# packstack --allinone
ERROR:root:Failed to load plugin from file prescript_000.py
ERROR:root:Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py", line 884, in loadPlugins
    moduleobj = __import__(moduleToLoad)
  File "/usr/lib/python2.7/site-packages/packstack/plugins/prescript_000.py", line 35, in <module>
    from packstack.modules.documentation import update_params_usage
  File "/usr/lib/python2.7/site-packages/packstack/modules/documentation.py", line 20, in <module>
    from docutils import core
  File "/usr/lib/python2.7/site-packages/docutils/core.py", line 20, in <module>
    from docutils import frontend, io, utils, readers, writers
  File "/usr/lib/python2.7/site-packages/docutils/frontend.py", line 41, in <module>
    import docutils.utils
  File "/usr/lib/python2.7/site-packages/docutils/utils/__init__.py", line 20, in <module>
    import docutils.io
  File "/usr/lib/python2.7/site-packages/docutils/io.py", line 18, in <module>
    from docutils.utils.error_reporting import locale_encoding, ErrorString, ErrorOutput
  File "/usr/lib/python2.7/site-packages/docutils/utils/error_reporting.py", line 46, in <module>
    locale_encoding = locale.getlocale()[1] or locale.getdefaultlocale()[1]
  File "/usr/lib64/python2.7/locale.py", line 511, in getdefaultlocale
    return _parse_localename(localename)
  File "/usr/lib64/python2.7/locale.py", line 443, in _parse_localename
    raise ValueError, 'unknown locale: %s' % localename
ValueError: unknown locale: UTF-8

ERROR:root:Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py", line 949, in main
    loadPlugins()
  File "/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py", line 892, in loadPlugins
    raise Exception("Failed to load plugin from file %s" % item)
Exception: Failed to load plugin from file prescript_000.py

ERROR : Failed to load plugin from file prescript_000.py
Traceback (most recent call last):
  File "/usr/bin/packstack", line 15, in <module>
    run_setup.main()
  File "/usr/lib/python2.7/site-packages/packstack/installer/run_setup.py", line 1019, in main
    print(output_messages.ERR_CHECK_LOG_FILE_FOR_MORE_INFO % (logFile))
UnboundLocalError: local variable 'logFile' referenced before assignment

Solution:

export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8