kaxil commented on pull request #19637:
URL: https://github.com/apache/airflow/pull/19637#issuecomment-973165667


   > > Can you give some examples of this please except for the 2.2.0 issue 
where just reserializing would have helped
   > 
   > Yep. It all started with this: #19519 for example.
   > 
   > We still do not know what the root cause was. It was "solved" by the user 
by recreating the DB from the scratch. I can try to find more similar issues 
(and there were similar slack conversations which might be more difficult to 
find).
   > 
   > But he fact that we do not know what was the reason, tells me that we will 
have more cases like that.
   > 
   > Also we can ask the orignal author of the #19432 @collinmcnulty - maybe 
you can provide more cases (when/why you needed to run reserialization - and 
maybe some logs from the past would be helpful).
   
   Collin works with us :) We were both debugging the same issue after 2.2.0 -- 
but that's what I think that is it just one isolated  issue in 2 years with 
2.2.0.
   
   >We still do not know what the root cause was. It was "solved" by the user 
by recreating the DB from the scratch.
   I can try to find more similar issues (and there were similar slack 
conversations which might be more difficult to find).
   
   The root cause was we missed accounting for deserialization of Params. 
   
   


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