[GitHub] [incubator-superset] bkyryliuk commented on issue #10530: periodic SQLAlchemy errors with SQL-based alerting tasks

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

bkyryliuk commented on issue #10530:
URL: https://github.com/apache/incubator-superset/issues/10530#issuecomment-689689258


   It seems that celery is not happy to deal with the sqlalchemy pool & that's related to the process forking. The recommendation I found was to have 1 session per worker to avoid issues like this. Here is some read:
   * https://stackoverflow.com/questions/14526249/celery-worker-database-connection-pooling 
   *  https://stackoverflow.com/questions/44598266/sqlalchemy-exc-nosuchcolumnerror-when-im-querying-in-parent-process
   *  http://www.prschmid.com/2013/04/using-sqlalchemy-with-celery-tasks.html 
   
   cc @willbarrett @villebro 


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