kszucs commented on issue #9637:
URL: https://github.com/apache/arrow-rs/issues/9637#issuecomment-4169257955

   This is due to the allowed null leaf array elements which is explicitly 
disallowed in the C++ parquet writer. Apparently the rust implementation allows 
it and the benchmarks generate list arrays with values for null list elements. 
I assume this only affects rare cases, but adjusting the cdc chunker to support 
both layouts.
   
   > Similar to the layout of variable-size binary, a null value may correspond 
to a non-empty segment in the child array. When this is true, the content of 
the corresponding segment can be arbitrary.
   
   See https://arrow.apache.org/docs/format/Columnar.html#list-layout


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