[jira] [Created] (AIRFLOW-1017) get_task_instance should return None instead of throw an exception for non-existent TIs

["Dan Davydov (JIRA)" <ji...@apache.org>]

Dan Davydov created AIRFLOW-1017:
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             Summary: get_task_instance should return None instead of throw an exception for non-existent TIs
                 Key: AIRFLOW-1017
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-1017
             Project: Apache Airflow
          Issue Type: Bug
            Reporter: Dan Davydov
            Assignee: Dan Davydov
            Priority: Critical


We were seeing errors in our scheduler like the following due to this issue:
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2796, in one
    raise orm_exc.NoResultFound("No row was found for one()")




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