Splunk add-on builder doesnt't work with IPv6 and behind reverse proxy

[MaverickT]

Since I can't submit a case I would like to inform you that Splunk add-on builder doesn't work if my instance listens on IPv6 and is behind a reverse proxy (I am not sure if the later thing has any effect). I am running the latest version of Splunk Enterprise and Add-on builder.

The internal log shows the follwing error:

2020-04-22 12:27:20,061 ERROR   [5ea01c08067fd58014dc50] error:335 - Traceback (most recent call last):
  File "/opt/splunk/lib/python3.7/site-packages/cherrypy/_cprequest.py", line 628, in respond
    self._do_respond(path_info)
  File "/opt/splunk/lib/python3.7/site-packages/cherrypy/_cprequest.py", line 687, in _do_respond
    response.body = self.handler()
  File "/opt/splunk/lib/python3.7/site-packages/cherrypy/lib/encoding.py", line 219, in __call__
    self.body = self.oldhandler(*args, **kwargs)
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/htmlinjectiontoolfactory.py", line 75, in wrapper
    resp = handler(*args, **kwargs)
  File "/opt/splunk/lib/python3.7/site-packages/cherrypy/_cpdispatch.py", line 54, in __call__
    return self.callable(*self.args, **self.kwargs)
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/routes.py", line 383, in default
    return route.target(self, **kw)
  File "</opt/splunk/lib/python3.7/site-packages/decorator.py:decorator-gen-3662>", line 2, in is_user_allow_to_user_tabuilder
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/decorators.py", line 40, in rundecs
    return fn(*a, **kw)
  File "</opt/splunk/lib/python3.7/site-packages/decorator.py:decorator-gen-3660>", line 2, in is_user_allow_to_user_tabuilder
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/decorators.py", line 118, in check
    return fn(self, *a, **kw)
  File "</opt/splunk/lib/python3.7/site-packages/decorator.py:decorator-gen-3659>", line 2, in is_user_allow_to_user_tabuilder
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/decorators.py", line 166, in validate_ip
    return fn(self, *a, **kw)
  File "</opt/splunk/lib/python3.7/site-packages/decorator.py:decorator-gen-3658>", line 2, in is_user_allow_to_user_tabuilder
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/decorators.py", line 245, in preform_sso_check
    return fn(self, *a, **kw)
  File "</opt/splunk/lib/python3.7/site-packages/decorator.py:decorator-gen-3657>", line 2, in is_user_allow_to_user_tabuilder
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/decorators.py", line 284, in check_login
    return fn(self, *a, **kw)
  File "</opt/splunk/lib/python3.7/site-packages/decorator.py:decorator-gen-3656>", line 2, in is_user_allow_to_user_tabuilder
  File "/opt/splunk/lib/python3.7/site-packages/splunk/appserver/mrsparkle/lib/decorators.py", line 304, in handle_exceptions
    return fn(self, *a, **kw)
  File "/opt/splunk/etc/apps/splunk_app_addon-builder/bin/aob/aob_common/metric_collector/metric_util.py", line 81, in func_wrappers
    ret = func(*args, **kwargs)
  File "<string>", line 43, in is_user_allow_to_user_tabuilder
  File "/opt/splunk/etc/apps/splunk_app_addon-builder/bin/aob/aob_common/metric_collector/metric_util.py", line 81, in func_wrappers
    ret = func(*args, **kwargs)
  File "/opt/splunk/etc/apps/splunk_app_addon-builder/bin/tabuilder_utility/common_util.py", line 250, in create_splunk_service
    'pool_maxsize': 5})
  File "/opt/splunk/etc/apps/splunk_app_addon-builder/bin/splunk_app_add_on_builder/solnlib/net_utils.py", line 129, in wrapper
    'Illegal argument: {}={}'.format(arg, value))
ValueError: Illegal argument: host=::1

[MaverickT · Accepted solution]

I had solved the problem by disabling listenOnIPv6 in this instance's server.conf since this particular instance can "survive" only running on IPv4.

server.conf

[general]
listenOnIPv6 = no