vdiravka commented on pull request #2192:
URL: https://github.com/apache/drill/pull/2192#issuecomment-812152774


   @paul-rogers I am familiar with this issue in Drill:
   
https://stackoverflow.com/questions/50487014/apache-drill-1-12-0-failure-in-starting-embedded-drillbit-and-no-current-conn/50495562#50495562
   
   And I am absolutely agree about plugins configs versioning. We have it for 
parquet metdata, smth similar can be done for plugins. And other thing is 
proper migration tool for the new schema of storage plugins configs (every 
plugin configs change will require to update plugins configs version and 
migration on the new Drill sturtup with an old configs).
   
   But it sounds like a useful, but new feature. It shouldn't prevent to go 
further with current PR. Especially in current PR, I added code for an old 
plugins configs, so new Drill start-up will not cause any issues with an old 
plugin configs.


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