yihua opened a new issue, #20067:
URL: https://github.com/apache/hudi/issues/20067

   CDC incremental queries on MERGE_ON_READ tables of table version 6 are 
broken:
   
   - Spark and Flink fail on the driver with `HoodieException: Fail to parse 
the base file and log files from DeltaCommit` (caused by 
`InvalidAvroMagicException`) when inferring changes from log files. The delta 
commit metadata is JSON in timeline layout 1 but is always parsed as Avro.
   - Flink bounds the log blocks it reads by the instant in the log file name. 
Before table version 8 that is the file slice's base instant, so changes of 
later delta commits are dropped and the deleted images of a replace commit are 
stale.
   
   part of #20064
   


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