devinjdangelo commented on code in PR #9737:
URL: https://github.com/apache/arrow-datafusion/pull/9737#discussion_r1536286168


##########
datafusion/core/src/dataframe/parquet.rs:
##########
@@ -166,4 +166,47 @@ mod tests {
 
         Ok(())
     }
+
+    #[tokio::test]
+    async fn write_parquet_with_small_rg_size() -> Result<()> {
+        let mut test_df = test_util::test_table().await?;
+        // make the test data larger so there are multiple batches
+        for _ in 0..7 {
+            test_df = test_df.clone().union(test_df)?;

Review Comment:
   The test with a batch size of 10 still panics on main and passes in this PR, 
but runs in 0.41 seconds.



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