LuciferYang commented on code in PR #43502:
URL: https://github.com/apache/spark/pull/43502#discussion_r1382327696


##########
common/kvstore/src/main/java/org/apache/spark/util/kvstore/RocksDBIterator.java:
##########
@@ -176,22 +183,30 @@ public boolean skip(long n) {
 
   @Override
   public synchronized void close() throws IOException {
-    db.notifyIteratorClosed(this);
+    db.notifyIteratorClosed(it);
     if (!closed) {
-      it.close();
-      closed = true;
-      next = null;
+      try {
+        it.close();
+        closed = true;
+        next = null;
+      } finally {
+        cancelResourceClean();
+      }
     }
   }
 
-  /**
-   * Because it's tricky to expose closeable iterators through many internal 
APIs, especially
-   * when Scala wrappers are used, this makes sure that, hopefully, the JNI 
resources held by
-   * the iterator will eventually be released.
-   */
-  @Override
-  protected void finalize() throws Throwable {
-    db.closeIterator(this);
+  private void cancelResourceClean() {
+    this.resourceCleaner.statusToFalse();
+    this.cleanable.clean();
+  }
+
+  @VisibleForTesting
+  ResourceCleaner getResourceCleaner() {
+    return resourceCleaner;
+  }
+
+  public RocksIterator getRocksIterator() {

Review Comment:
   can we remove the `public`? and I like `internalIterator`



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