Hey everyone, I have a HDP 2.6.1 cluster (4 nodes), with HDF management pack installed. Druid (therefore Superset) is installed, started and seems OK in Ambari. When I want to add new slice in Superset (http://superset_node.local:9088/slicemodelview/add) I receive this stacktrace: Traceback (most recent call last): File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/flask/app.py", line 1982, in wsgi_app response = self.full_dispatch_request() File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/flask/app.py", line 1614, in full_dispatch_request rv = self.handle_user_exception(e) File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/flask/app.py", line 1517, in handle_user_exception reraise(exc_type, exc_value, tb) File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/flask/_compat.py", line 33, in reraise raise value File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/flask/app.py", line 1612, in full_dispatch_request rv = self.dispatch_request() File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/flask/app.py", line 1598, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/flask_appbuilder/security/decorators.py", line 26, in wraps return f(self, *args, **kwargs) File "/usr/hdp/2.6.1.0-129/superset/lib/python3.4/site-packages/superset/views.py", line 855, in add redirect_url = "/r/msg/?url={}&msg={}".format(url, msg) UnboundLocalError: local variable 'url' referenced before assignment The function it references: class SliceModelView(SupersetModelView, DeleteMixin): # noqa datamodel = SQLAInterface(models.Slice) can_add = False label_columns = { 'datasource_link': 'Datasource', } list_columns = [ 'slice_link', 'viz_type', 'datasource_link', 'creator', 'modified'] edit_columns = [ 'slice_name', 'description', 'viz_type', 'owners', 'dashboards', 'params', 'cache_timeout'] base_order = ('changed_on', 'desc') description_columns = { 'description': Markup( "The content here can be displayed as widget headers in the " "dashboard view. Supports " "<a href='https://daringfireball.net/projects/markdown/'>" "markdown</a>"), 'params': _( "These parameters are generated dynamically when clicking " "the save or overwrite button in the explore view. This JSON " "object is exposed here for reference and for power users who may " "want to alter specific parameters."), 'cache_timeout': _( "Duration (in seconds) of the caching timeout for this slice." ), } base_filters = [['id', SliceFilter, lambda: []]] label_columns = { 'cache_timeout': _("Cache Timeout"), 'creator': _("Creator"), 'dashboards': _("Dashboards"), 'datasource_link': _("Datasource"), 'description': _("Description"), 'modified': _("Last Modified"), 'owners': _("Owners"), 'params': _("Parameters"), 'slice_link': _("Slice"), 'slice_name': _("Name"), 'table': _("Table"), 'viz_type': _("Visualization Type"), } def pre_update(self, obj): check_ownership(obj) def pre_delete(self, obj): check_ownership(obj) @expose('/add', methods=['GET', 'POST']) @has_access def add(self): widget = self._add() if not widget: return redirect(self.get_redirect()) sources = SourceRegistry.sources for source in sources: ds = db.session.query(SourceRegistry.sources[source]).first() if ds is not None: url = "/{}/list/".format(ds.baselink) msg = _("Click on a {} link to create a Slice".format(source)) break redirect_url = "/r/msg/?url={}&msg={}".format(url, msg) return redirect(redirect_url) On the cluster there's a MySQL installed. A database and a user 'superset' is created, access granted for the user. In Ambari everything seems to configured properly. I tried to reinstall and reconfigure Druid but the problem is the same again. Thanks for the help in advance. ... View more