showuon commented on a change in pull request #11105:
URL: https://github.com/apache/kafka/pull/11105#discussion_r675934074



##########
File path: 
streams/src/test/java/org/apache/kafka/streams/state/internals/RocksDBStoreTest.java
##########
@@ -872,62 +879,65 @@ public void 
shouldPerformRangeQueriesWithCachingDisabled() {
         context.setTime(1L);
         store.put(1, "hi");
         store.put(2, "goodbye");
-        final KeyValueIterator<Integer, String> range = store.range(1, 2);
-        assertEquals("hi", range.next().value);
-        assertEquals("goodbye", range.next().value);
-        assertFalse(range.hasNext());
+        try (final KeyValueIterator<Integer, String> range = store.range(1, 
2)) {
+            assertEquals("hi", range.next().value);
+            assertEquals("goodbye", range.next().value);
+            assertFalse(range.hasNext());
+        }
     }
 
     @Test
     public void shouldPerformAllQueriesWithCachingDisabled() {
         context.setTime(1L);
         store.put(1, "hi");
         store.put(2, "goodbye");
-        final KeyValueIterator<Integer, String> range = store.all();
-        assertEquals("hi", range.next().value);
-        assertEquals("goodbye", range.next().value);
-        assertFalse(range.hasNext());
+        try (final KeyValueIterator<Integer, String> range = store.all()) {
+            assertEquals("hi", range.next().value);
+            assertEquals("goodbye", range.next().value);
+            assertFalse(range.hasNext());
+        }
     }
 
     @Test
     public void 
shouldCloseOpenRangeIteratorsWhenStoreClosedAndThrowInvalidStateStoreOnHasNextAndNext()
 {
         context.setTime(1L);
         store.put(1, "hi");
         store.put(2, "goodbye");
-        final KeyValueIterator<Integer, String> iteratorOne = store.range(1, 
5);
-        final KeyValueIterator<Integer, String> iteratorTwo = store.range(1, 
4);
+        try (final KeyValueIterator<Integer, String> iteratorOne = 
store.range(1, 5);
+             final KeyValueIterator<Integer, String> iteratorTwo = 
store.range(1, 4)) {
 
-        assertTrue(iteratorOne.hasNext());
-        assertTrue(iteratorTwo.hasNext());
+            assertTrue(iteratorOne.hasNext());
+            assertTrue(iteratorTwo.hasNext());
 
-        store.close();
+            store.close();
 
-        try {
-            iteratorOne.hasNext();
-            fail("should have thrown InvalidStateStoreException on closed 
store");
-        } catch (final InvalidStateStoreException e) {
-            // ok
-        }
+            try {
+                iteratorOne.hasNext();
+                fail("should have thrown InvalidStateStoreException on closed 
store");
+            } catch (final InvalidStateStoreException e) {

Review comment:
       Good suggestion! Updated. Thank you.




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