a.parquet/_SUCCESS is not a Parquet file (too small length: 0)

you don't filter a _SUCCESS file，can't read a parquet dir?

Look for code that reads Parquet files from a directory, likely in a file reader or data source module. The issue is that a _SUCCESS marker file (size 0) is being incorrectly processed as a Parquet file. Identify the file filtering logic and add an exclusion for empty files or files named _SUCCESS. Check existing tests for Parquet directory reading to verify the fix.

索引モデルが issue の本文から書いたものです。