[GitHub] HeartSaVioR edited a comment on issue #18410: [SPARK-20971][SS] purge metadata log in FileStreamSource

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

HeartSaVioR edited a comment on issue #18410: [SPARK-20971][SS] purge metadata log in FileStreamSource
URL: https://github.com/apache/spark/pull/18410#issuecomment-465571238
 
 
   I played a bit with my idea (filter out entities which were in committed batch when compacting), and realized it cannot solve the issue which filtered out files being re-read (not sure I'm just missing here). 
   
   https://github.com/HeartSaVioR/spark/commit/00534b807fa0beec9019a5c15d9056a8d1f9c9bf
   
   Once the files are filtered out in metadata they could be included in source of new batch (even if SeenFilesMap could help a bit, it's not persisted to storage so the issue remains same when query is rerun).
   
   I think the best way to do this safely would be incorporating this to #22952 - when files are successfully archived or deleted, we're safe to filter out them in metadata log as well. I'll address it to #22952.

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