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https://issues.apache.org/jira/browse/AIRFLOW-7113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17080634#comment-17080634
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t oo commented on AIRFLOW-7113:
-------------------------------
[~Cong Zhu] pr is merged so can close this?
> Airflow failed to render gantt view due to missing start_date
> -------------------------------------------------------------
>
> Key: AIRFLOW-7113
> URL: https://issues.apache.org/jira/browse/AIRFLOW-7113
> Project: Apache Airflow
> Issue Type: Bug
> Components: core
> Affects Versions: 1.10.10
> Reporter: Cong Zhu
> Assignee: Cong Zhu
> Priority: Major
>
> Airflow failed to render gantt view if some task instances were missing
> start_date. This can happen when tasks failed with parsing issue.
> Example traceback:
> {quote}Traceback (most recent call last): File
> "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1988, in wsgi_app
> response = self.full_dispatch_request() File
> "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1641, in
> full_dispatch_request rv = self.handle_user_exception(e) File
> "/usr/local/lib/python2.7/dist-packages/newrelic/hooks/framework_flask.py",
> line 103, in _nr_wrapper_Flask_handle_exception_ return wrapped(*args,
> **kwargs) File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line
> 1544, in handle_user_exception reraise(exc_type, exc_value, tb) File
> "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1639, in
> full_dispatch_request rv = self.dispatch_request() File
> "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1625, in
> dispatch_request return self.view_functions[rule.endpoint](**req.view_args)
> File
> "/usr/local/lib/python2.7/dist-packages/newrelic/hooks/framework_flask.py",
> line 40, in _nr_wrapper_handler_ return wrapped(*args, **kwargs) File
> "/usr/local/lib/python2.7/dist-packages/airflow/www_rbac/decorators.py", line
> 121, in wrapper return f(self, *args, **kwargs) File
> "/usr/local/lib/python2.7/dist-packages/flask_appbuilder/security/decorators.py",
> line 101, in wraps return f(self, *args, **kwargs) File
> "/usr/local/lib/python2.7/dist-packages/airflow/www_rbac/decorators.py", line
> 56, in wrapper return f(*args, **kwargs) File
> "/usr/local/lib/python2.7/dist-packages/airflow/utils/db.py", line 77, in
> wrapper return func(*args, **kwargs) File
> "/usr/local/lib/python2.7/dist-packages/airflow/www_rbac/views.py", line
> 1889, in gantt 'startDate': wwwutils.epoch(start_date), File
> "/usr/local/lib/python2.7/dist-packages/airflow/www_rbac/utils.py", line 192,
> in epoch return int(time.mktime(dttm.timetuple())) * 1000, AttributeError:
> 'NoneType' object has no attribute 'timetuple'{quote}
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