Steen Manniche created AIRFLOW-1490:

             Summary: In order to get details on exceptions thrown by tasks, 
the onfailure callback needs an enhancement
                 Key: AIRFLOW-1490
             Project: Apache Airflow
          Issue Type: Improvement
          Components: core
    Affects Versions: Airflow 2.0, Airflow 1.8
            Reporter: Steen Manniche

The code called when an exception is thrown by a task receives information on 
the exception thrown from the task, but fails to delegate this information to 
the registered callbacks. 
sends the context to the registered failure callback, but this context does not 
include the thrown exception.

The supplied patch proposes a non-api-breaking way of including the exception 
in the context in order to provide clients with the full exception type and 

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