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[Bug 1483955] Re: Horizon homepage shows internal server error

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Richard Jones <r1chardj0n3s@xxxxxxxxx>
Date: Mon, 21 Dec 2015 00:07:22 -0000
Reply-to: Bug 1483955 <1483955@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: horizon
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1483955

Title:
  Horizon homepage shows internal server error

Status in OpenStack Dashboard (Horizon):
  Invalid

Bug description:
  I created a devstack today having Sahara installed. And when I login, Horizon report a 500 internal server error as below:
  Internal Server Error

  The server encountered an internal error or misconfiguration and was
  unable to complete your request.

  Please contact the server administrator at [no address given] to
  inform them of the time this error occurred, and the actions you
  performed just before this error.

  More information about this error may be available in the server error
  log.

  --------------------------------------------------------------------------------

  Apache/2.4.7 (Ubuntu) Server at 127.0.0.1 Port 80

  I checked the horizon_error.log and it showed:

  2015-08-12 03:25:56.402471 Internal Server Error: /admin/
  2015-08-12 03:25:56.402502 Traceback (most recent call last):
  2015-08-12 03:25:56.402507   File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 137, in get_response
  2015-08-12 03:25:56.402511     response = response.render()
  2015-08-12 03:25:56.402515   File "/usr/local/lib/python2.7/dist-packages/django/template/response.py", line 103, in render
  2015-08-12 03:25:56.402518     self.content = self.rendered_content
  2015-08-12 03:25:56.402522   File "/usr/local/lib/python2.7/dist-packages/django/template/response.py", line 80, in rendered_content
  2015-08-12 03:25:56.402527     content = template.render(context)
  2015-08-12 03:25:56.402531   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 148, in render
  2015-08-12 03:25:56.402535     return self._render(context)
  2015-08-12 03:25:56.402538   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 142, in _render
  2015-08-12 03:25:56.402542     return self.nodelist.render(context)
  2015-08-12 03:25:56.402546   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render
  2015-08-12 03:25:56.402549     bit = self.render_node(node, context)
  2015-08-12 03:25:56.402553   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 80, in render_node
  2015-08-12 03:25:56.402556     return node.render(context)
  2015-08-12 03:25:56.402559   File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 126, in render
  2015-08-12 03:25:56.402563     return compiled_parent._render(context)
  2015-08-12 03:25:56.402566   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 142, in _render
  2015-08-12 03:25:56.402570     return self.nodelist.render(context)
  2015-08-12 03:25:56.402573   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render
  2015-08-12 03:25:56.402577     bit = self.render_node(node, context)
  2015-08-12 03:25:56.402580   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 80, in render_node
  2015-08-12 03:25:56.402583     return node.render(context)
  2015-08-12 03:25:56.402587   File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 65, in render
  2015-08-12 03:25:56.402590     result = block.nodelist.render(context)
  2015-08-12 03:25:56.402593   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render
  2015-08-12 03:25:56.402597     bit = self.render_node(node, context)
  2015-08-12 03:25:56.402600   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 80, in render_node
  2015-08-12 03:25:56.402604     return node.render(context)
  2015-08-12 03:25:56.402607   File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 65, in render
  2015-08-12 03:25:56.402628     result = block.nodelist.render(context)
  2015-08-12 03:25:56.402632   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render
  2015-08-12 03:25:56.402636     bit = self.render_node(node, context)
  2015-08-12 03:25:56.402639   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 80, in render_node
  2015-08-12 03:25:56.402643     return node.render(context)
  2015-08-12 03:25:56.402646   File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 150, in render
  2015-08-12 03:25:56.402650     return template.render(context)
  2015-08-12 03:25:56.402653   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 148, in render
  2015-08-12 03:25:56.402656     return self._render(context)
  2015-08-12 03:25:56.402660   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 142, in _render
  2015-08-12 03:25:56.402663     return self.nodelist.render(context)
  2015-08-12 03:25:56.402666   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render
  2015-08-12 03:25:56.402670     bit = self.render_node(node, context)
  2015-08-12 03:25:56.402673   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 80, in render_node
  2015-08-12 03:25:56.402676     return node.render(context)
  2015-08-12 03:25:56.402680   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 1207, in render
  2015-08-12 03:25:56.402683     _dict = func(*resolved_args, **resolved_kwargs)
  2015-08-12 03:25:56.402687   File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/templatetags/horizon.py", line 56, in horizon_nav
  2015-08-12 03:25:56.402690     panel_groups = dash.get_panel_groups()
  2015-08-12 03:25:56.402694   File "/opt/stack/horizon/openstack_dashboard/wsgi/../../horizon/base.py", line 482, in get_panel_groups
  2015-08-12 03:25:56.402697     registered.pop(panel.__class__)
  2015-08-12 03:25:56.402701 KeyError: <class 'openstack_dashboard.contrib.sahara.content.data_processing.wizard.panel.WizardPanel'>
  2015-08-12 03:25:56.604149 mod_wsgi (pid=28641): Exception occurred processing WSGI script '/opt/stack/horizon/openstack_dashboard/wsgi/django.wsgi'.
  2015-08-12 03:25:56.604194 Traceback (most recent call last):
  2015-08-12 03:25:56.604212   File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/wsgi.py", line 187, in __call__
  2015-08-12 03:25:56.604343     response = self.get_response(request)
  2015-08-12 03:25:56.604361   File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 199, in get_response
  2015-08-12 03:25:56.604389     response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
  2015-08-12 03:25:56.604399   File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 236, in handle_uncaught_exception
  2015-08-12 03:25:56.604414     return debug.technical_500_response(request, *exc_info)
  2015-08-12 03:25:56.604426   File "/usr/local/lib/python2.7/dist-packages/django/views/debug.py", line 91, in technical_500_response
  2015-08-12 03:25:56.604702     html = reporter.get_traceback_html()
  2015-08-12 03:25:56.604718   File "/usr/local/lib/python2.7/dist-packages/django/views/debug.py", line 350, in get_traceback_html
  2015-08-12 03:25:56.604736     return t.render(c)
  2015-08-12 03:25:56.604746   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 148, in render
  2015-08-12 03:25:56.604761     return self._render(context)
  2015-08-12 03:25:56.604770   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 142, in _render
  2015-08-12 03:25:56.604783     return self.nodelist.render(context)
  2015-08-12 03:25:56.604792   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render
  2015-08-12 03:25:56.604806     bit = self.render_node(node, context)
  2015-08-12 03:25:56.604823   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 80, in render_node
  2015-08-12 03:25:56.604839     return node.render(context)
  2015-08-12 03:25:56.604860   File "/usr/local/lib/python2.7/dist-packages/django/template/defaulttags.py", line 312, in render
  2015-08-12 03:25:56.605171     return nodelist.render(context)
  2015-08-12 03:25:56.605191   File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 844, in render
  2015-08-12 03:25:56.605208     bit = self.render_node(node, context)
  2015-08-12 03:25:56.605218   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 80, in render_node
  2015-08-12 03:25:56.605233     return node.render(context)
  2015-08-12 03:25:56.605242   File "/usr/local/lib/python2.7/dist-packages/django/template/debug.py", line 93, in render
  2015-08-12 03:25:56.605255     output = force_text(output)
  2015-08-12 03:25:56.605268   File "/usr/local/lib/python2.7/dist-packages/django/utils/encoding.py", line 85, in force_text
  2015-08-12 03:25:56.605370     s = six.text_type(s)
  2015-08-12 03:25:56.605393 TypeError: coercing to Unicode: need string or buffer, __proxy__ found

  I guess it is like a unicode encoding issue.

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References

[Bug 1483955] [NEW] Horizon homepage shows internal server error
From: Ken Chen, 2015-08-12