tianhui5 commented on issue #8025:
URL: 
https://github.com/apache/incubator-doris/issues/8025#issuecomment-1040026201


   > fault tolerance design
   
   Debezium is periodically flushing those offsets to persistent storage, So 
Doris will receive each source record exactly once during normal operation 
(including restart after a graceful shutdown), but do need to be tolerant of 
receiving duplicate events immediately following a restart after a crash or 
improper shutdown.


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