hudi-agent commented on code in PR #19202:
URL: https://github.com/apache/hudi/pull/19202#discussion_r3585363231


##########
hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/table/format/cdc/CdcIterators.java:
##########
@@ -135,14 +153,25 @@ public boolean hasNext() {
     }
 
     @Override
-    public RowData next() {
+    public synchronized RowData next() {
+      if (closed) {
+        throw new NoSuchElementException("CDC file-splits iterator was closed 
during teardown");
+      }
+      if (recordIterator == null) {
+        throw new NoSuchElementException("No more CDC records");
+      }
       return recordIterator.next();
     }
 
     @Override
-    public void close() {
+    public synchronized void close() {
+      if (closed) {
+        return;
+      }
+      closed = true;
       if (recordIterator != null) {
         recordIterator.close();
+        recordIterator = null;

Review Comment:
   🤖 nit: `recordIterator` is nulled after close but `imageManager` isn't — 
could you add `imageManager = null` after `imageManager.close()` for symmetry? 
The `closed` guard makes neither null functionally necessary, but the asymmetry 
might prompt a future reader to wonder whether the null carries semantic weight.
   
   <sub><i>⚠️ AI-generated; verify before applying. React 👍/👎 to flag 
quality.</i></sub>



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