Github user aandis commented on a diff in the pull request:
    --- Diff: storm-core/src/jvm/org/apache/storm/state/ ---
    @@ -45,4 +47,9 @@
          * @return the value or defaultValue if no mapping is found
         V get(K key, V defaultValue);
    +    /**
    +     * @return all key value mappings as an unmodifiable map.
    +     */
    +    Map<K, V> getAll();
    --- End diff --
    @arunmahadevan You mean an `iterator` over the original 
 `iterator` also has a `remove` method which shouldn't be a supported operation 
over `KeyValueState` since there's 
 That's the reason for creating and returning an unmodifiable map. :)

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