[GitHub] [airflow] dossett opened a new pull request #5386: AIRFLOW-4748 Print stacktrace for dagbag process exceptions

[GitBox <gi...@apache.org>]

dossett opened a new pull request #5386: AIRFLOW-4748 Print stacktrace for dagbag process exceptions
URL: https://github.com/apache/airflow/pull/5386
 
 
   Make sure you have checked _all_ steps below.
   
   ### Jira
   
   - [x] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/projects/AIRFLOW/issues/AIRFLOW-4748) issues and references them in the PR title. 
   
   ### Description
   
   - [X] Here are some details about my PR, including screenshots of any UI changes: provide extra error handling information from failed dag parsing
   
   ### Tests
   
   - [x] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   
   ### Commits
   
   - [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
     1. Subject is separated from body by a blank line
     1. Subject is limited to 50 characters (not including Jira issue reference)
     1. Subject does not end with a period
     1. Subject uses the imperative mood ("add", not "adding")
     1. Body wraps at 72 characters
     1. Body explains "what" and "why", not "how"
   
   ### Code Quality
   
   - [ ] Passes `flake8`
   

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