rdblue commented on a change in pull request #1334:
URL: https://github.com/apache/iceberg/pull/1334#discussion_r479673654



##########
File path: data/src/main/java/org/apache/iceberg/data/orc/GenericOrcWriters.java
##########
@@ -231,7 +234,13 @@ public void nonNullWrite(int rowId, String data, 
ColumnVector output) {
 
     @Override
     public void nonNullWrite(int rowId, ByteBuffer data, ColumnVector output) {
-      ((BytesColumnVector) output).setRef(rowId, data.array(), 0, 
data.array().length);
+      if (data != null && data.hasArray()) {
+        ((BytesColumnVector) output).setRef(rowId, data.array(), 
data.arrayOffset() + data.position(), data.remaining());
+      } else {
+        byte[] rawData = ByteBuffers.toByteArray(data);
+        int length = rawData == null ? 0 : rawData.length;
+        ((BytesColumnVector) output).setRef(rowId, rawData, 0, length);

Review comment:
       The null check isn't needed because this is `nonNullWrite` so nulls have 
already been handled at this point.




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