rdblue commented on a change in pull request #3533:
URL: https://github.com/apache/iceberg/pull/3533#discussion_r748885681



##########
File path: 
arrow/src/main/java/org/apache/iceberg/arrow/vectorized/VectorizedArrowReader.java
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@@ -448,6 +473,14 @@ public String toString() {
 
     @Override
     public void setBatchSize(int batchSize) {
+      this.batchSize = (batchSize == 0) ? DEFAULT_BATCH_SIZE : batchSize;

Review comment:
       I think this needs to reallocate the nullability holder if batch size 
increased, or else a batch size change could cause it to overflow.




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