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Description of problem:
If we execute ds-logpipe.py with wrong arguments, then instead of proper message we see AttributeError python exception. 

How reproducible:
Always

Step to Reproduce:
Execute command line utility ds-logpipe.py with a wrong arguments:
ds-logpipe.py wrong_arg1 wrongarg2

Actual results:
Traceback (most recent call last):
  File "./ldap/admin/src/scripts/ds-logpipe.py", line 263, in <module>
    options, logfname = parse_options()
  File "./ldap/admin/src/scripts/ds-logpipe.py", line 259, in parse_options
    parser.error("error - unhandled command line arguments: %s" % args.join(' '))
AttributeError: 'list' object has no attribute 'join'

Expected results:
Usage: ds-logpipe.py <name of pipe> [options]

ds-logpipe.py: error: error - unhandled command line arguments: wrong_arg1 wrongarg2

Build tested:
389-ds-base-1.3.5.4-1.el7.x86_64

Steps to verify:
[root@host ~]# ds-logpipe.py wrong_arg1 wrongarg2

Output:
Usage: ds-logpipe.py <name of pipe> [options]

ds-logpipe.py: error: error - unhandled command line arguments: wrong_arg1 wrongarg2

Marking as verified.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2016-2594.html