dejii commented on PR #38149:
URL: https://github.com/apache/beam/pull/38149#issuecomment-4239348212

   Hey @stankiewicz - thanks for the review.
   
   > Doing it per bundle is an overkill, especially if for each bundle there 
are many tables to write to, catalog will waste plenty of time on loading table 
credentials.
   
   Just to clarify - closing `FileIO` per bundle is the current behavior, and 
it's not wasted time but thrown errors when using dynamic destinations: the 
catalog tries to reuse a dead connection pool on every subsequent bundle, and 
the pipeline ultimately fails.
   


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