fix bug in code causing test failure.

Author: bharatviswa504

hadoop-hdds/common/src/main/java/org/apache/hadoop/utils/db/TypedTable.java

@@ -100,13 +100,16 @@ public TypedTable(
       //fill cache
       try(TableIterator<KEY, ? extends KeyValue<KEY, VALUE>> tableIterator =
               iterator()) {
-        KeyValue<KEY, VALUE> kv = tableIterator.next();
 
-        // We should build cache after OM restart when clean up policy is NEVER.
-        // Setting epoch value -1, so that when it is marked for delete, this
-        // will be considered for cleanup.
-        cache.put(new CacheKey<>(kv.getKey()),
-            new CacheValue<>(Optional.of(kv.getValue()), EPOCH_DEFAULT));
+        while (tableIterator.hasNext()) {
+          KeyValue< KEY, VALUE > kv = tableIterator.next();
+
+          // We should build cache after OM restart when clean up policy is NEVER.
+          // Setting epoch value -1, so that when it is marked for delete, this
+          // will be considered for cleanup.
+          cache.put(new CacheKey<>(kv.getKey()),
+              new CacheValue<>(Optional.of(kv.getValue()), EPOCH_DEFAULT));
+        }
       }
     }
   }