{{ exc_type.name }} at {{ handler.request.path }}

{% if exc_value %}{{ exc_value }}{% else %}No exception message supplied{% end %}

Request method:	{{ handler.request.method }}
Request URL:	{{ handler.request.full_url() }}
Tornado version:	{{ tornado_version }}
Exception type:	{{ exc_type.__name__ }}
Exception value:	{{ exc_value }}
Exception location:	{{ frames[0]['filename'] }}, line {{ frames[0]['lineno'] }}, in `{{ frames[0]['function'] }}`
Python executable:	{{ sys_executable }}
Python version:	{{ sys_version }}
Python path:	{{ pprint(sys_path) }}

{% for index, frame in enumerate(frames) %}

{{ frame['filename'] }}, line {{ frame['lineno'] }}, in {{ frame['function'] }}

{% if frame['lines'] %} {% for lineno, line in frame['lines'] %} {% end %}

{{ lineno }}.

{% end %} {% if frame['vars'] %} {% for name, value in frame['vars'].items() %} {% end %}

Name	Value
{{ name }}	{{ value }}

{% end %}

    {% for line in traceback.format_exception(exc_type, exc_value, exc_tb) %}
        {{ line }}
    {% end %}

{% set query_args = handler.request.query_arguments %} {% if query_args %} {% for arg in query_args %} {% end %}

Name	Value
{{ arg }}	{{ query_args[arg] }}

{% else %}

No Query arguments

{% end %}

{% set body_args = handler.request.body_arguments %} {% if body_args %} {% for arg in body_args %} {% end %}

Name	Value
{{ arg }}	{{ body_args[arg] }}

{% else %}

No Body arguments

{% end %}

{% for arg, value in handler.request.headers.items() %} {% if arg == 'Cookie' %} {% else %} {% end %} {% end %}

Name	Value
{{ arg }}	{{ pprint(value) }}	{{ value }}

{% for arg, value in app_settings.items() %} {% end %}

Name	Value
{{ arg }}	{{ value }}

You're seeing this error because you have debug=True in your Tornado app settings.

Change that to False, and Tornado will display a standard page generated by the handler for this status code.